{"id":100200,"date":"2026-02-15T20:26:24","date_gmt":"2026-02-15T20:26:24","guid":{"rendered":"https:\/\/vibromera.eu\/?post_type=calculator&#038;p=100200"},"modified":"2026-04-05T15:35:22","modified_gmt":"2026-04-05T15:35:22","slug":"proximity-probe-setup","status":"publish","type":"calculator","link":"https:\/\/vibromera.eu\/tl\/calculators\/proximity-probe-setup\/","title":{"rendered":"Calculator ng Gap Voltage ng Proximity Probe | Vibromera"},"content":{"rendered":"\n<script type=\"application\/ld+json\">\n{\"@context\":\"https:\/\/schema.org\",\"@type\":\"WebApplication\",\"name\":\"Proximity Probe Gap Voltage Calculator\",\"description\":\"Eddy current proximity probe gap voltage and linearity range calculator.\",\"url\":\"https:\/\/vibromera.eu\/calculators\/proximity-probe-setup\/\",\"applicationCategory\":\"Engineering Calculator\",\"operatingSystem\":\"Any (Web Browser)\",\"offers\":{\"@type\":\"Offer\",\"price\":\"0\",\"priceCurrency\":\"EUR\"},\"creator\":{\"@type\":\"Organization\",\"name\":\"Vibromera\",\"url\":\"https:\/\/vibromera.eu\/\"},\"datePublished\":\"2024-01-01\",\"dateModified\":\"2025-02-14\",\"inLanguage\":\"en\",\"isAccessibleForFree\":true}\n<\/script>\n\n<script type=\"application\/ld+json\">\n{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[\n{\"@type\":\"Question\",\"name\":\"How does an eddy current proximity probe work?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"An eddy current probe generates a high-frequency magnetic field. When a conductive target (shaft) enters this field, eddy currents are induced, which change the probe's impedance. The proximitor driver converts this impedance change to a voltage proportional to the gap distance.\"}},\n{\"@type\":\"Question\",\"name\":\"What is the standard sensitivity for proximity probes?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The most common sensitivity is 200 mV\/mil (7.87 V\/mm) for API 670 compliant systems. European systems often use 8 mV\/\u03bcm. The relationship is linear within the specified range.\"}},\n{\"@type\":\"Question\",\"name\":\"What is the normal gap voltage setting?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"API 670 recommends a gap voltage of \u221210V DC (corresponding to approximately 50 mil or 1.27 mm gap) for standard 200 mV\/mil probes. This centers the measurement in the linear range.\"}},\n{\"@type\":\"Question\",\"name\":\"What is the linear range of a proximity probe?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"For standard 8mm probes: 0.25\u20132.3 mm (10\u201390 mil). For 5mm probes: 0.25\u20131.3 mm (10\u201350 mil). For 12mm probes: 0.5\u20134.0 mm (20\u2013160 mil). Output is linear within \u00b15% in this range.\"}},\n{\"@type\":\"Question\",\"name\":\"What target material affects sensitivity?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Probes are calibrated for 4140 steel. Other materials have different sensitivities: stainless steel (AISI 304) ~0.85\u00d7, aluminum ~0.40\u00d7, brass ~0.50\u00d7, titanium ~0.60\u00d7. Material correction factors must be applied.\"}}\n]}\n<\/script>\n\n<script type=\"application\/ld+json\">\n{\"@context\":\"https:\/\/schema.org\",\"@type\":\"BreadcrumbList\",\"itemListElement\":[\n{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/vibromera.eu\/\"},\n{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Calculators\",\"item\":\"https:\/\/vibromera.eu\/calculators\/\"},\n{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Proximity Probe Setup\",\"item\":\"https:\/\/vibromera.eu\/calculators\/proximity-probe-setup\/\"}\n]}\n<\/script>\n\n<link rel=\"preconnect\" href=\"https:\/\/fonts.googleapis.com\">\n\n<link rel=\"preconnect\" href=\"https:\/\/fonts.gstatic.com\" crossorigin>\n\n<link href=\"https:\/\/fonts.googleapis.com\/css2?family=DM+Sans:ital,opsz,wght@0,9..40,300;0,9..40,400;0,9..40,500;0,9..40,600;0,9..40,700;1,9..40,400&#038;family=JetBrains+Mono:wght@400;500;600&#038;family=Fraunces:opsz,wght@9..144,700;9..144,800&#038;display=swap\" rel=\"stylesheet\">\n\n<link rel=\"stylesheet\" href=\"https:\/\/cdn.jsdelivr.net\/npm\/katex@0.16.11\/dist\/katex.min.css\">\n\n<style>\n:root{--vc-bg:#f4f1ec;--vc-surface:#ffffff;--vc-surface-alt:#f8f6f2;--vc-ink:#1a1a1a;--vc-ink-secondary:#5a5650;--vc-ink-muted:#8a857e;--vc-accent:#c85a2a;--vc-accent-hover:#b04d22;--vc-accent-light:#fdf0ea;--vc-blue:#2a5c8c;--vc-blue-light:#eaf1f8;--vc-green:#2a7a4b;--vc-green-light:#eaf8ef;--vc-yellow:#a67c00;--vc-yellow-light:#fef9e8;--vc-red:#b91c1c;--vc-red-light:#fef2f2;--vc-border:#d9d4cc;--vc-border-light:#e8e4dd;--vc-shadow:0 1px 3px rgba(26,26,26,0.06),0 4px 12px rgba(26,26,26,0.04);--vc-shadow-lg:0 4px 12px rgba(26,26,26,0.08),0 16px 40px rgba(26,26,26,0.06);--vc-radius:8px;--vc-radius-lg:12px;--vc-font:'DM Sans',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;--vc-mono:'JetBrains Mono','Consolas','Monaco',monospace;--vc-display:'Fraunces',Georgia,serif}\n.vc-calculator{font-family:var(--vc-font);font-size:15px;line-height:1.65;color:var(--vc-ink);max-width:960px;margin:0 auto;padding:20px 16px 40px;-webkit-font-smoothing:antialiased}.vc-calculator *,.vc-calculator *::before,.vc-calculator *::after{box-sizing:border-box}\n.vc-header{text-align:center;padding:48px 24px 40px;position:relative}.vc-header::after{content:'';position:absolute;bottom:0;left:50%;transform:translateX(-50%);width:80px;height:3px;background:var(--vc-accent);border-radius:2px}.vc-header-eyebrow{font-family:var(--vc-mono);font-size:11px;font-weight:500;letter-spacing:0.15em;text-transform:uppercase;color:var(--vc-accent);margin:0 0 12px}.vc-header-title{font-family:var(--vc-display);font-size:clamp(24px,4vw,36px);font-weight:800;line-height:1.15;color:var(--vc-ink);margin:0 0 16px;letter-spacing:-0.02em}.vc-header-subtitle{font-size:15px;color:var(--vc-ink-secondary);margin:0 auto 20px;max-width:600px}.vc-badges{display:inline-flex;gap:8px;flex-wrap:wrap;justify-content:center}.vc-badge{font-family:var(--vc-mono);font-size:11px;font-weight:500;padding:4px 10px;border-radius:4px;background:var(--vc-surface);border:1px solid var(--vc-border);color:var(--vc-ink-secondary)}\n.vc-card{background:var(--vc-surface);border:1px solid var(--vc-border);border-radius:var(--vc-radius-lg);box-shadow:var(--vc-shadow);overflow:hidden;margin-top:32px}\n.vc-form{padding:24px}.vc-form-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}@media(max-width:600px){.vc-form-grid{grid-template-columns:1fr}}.vc-field{display:flex;flex-direction:column}.vc-label{font-size:12px;font-weight:600;letter-spacing:0.04em;text-transform:uppercase;color:var(--vc-ink-secondary);margin-bottom:6px}.vc-label-hint{font-weight:400;text-transform:none;letter-spacing:0;color:var(--vc-ink-muted);font-size:11px}.vc-select,.vc-input{width:100%;padding:10px 12px;border:1.5px solid var(--vc-border);border-radius:6px;font-family:var(--vc-font);font-size:14px;color:var(--vc-ink);background:var(--vc-surface);transition:border-color 0.15s,box-shadow 0.15s}.vc-select{padding-right:36px;appearance:none;-webkit-appearance:none;cursor:pointer;background-image:url(\"data:image\/svg+xml,%3Csvg xmlns='http:\/\/www.w3.org\/2000\/svg' width='16' height='16' fill='none' stroke='%235a5650' stroke-width='2'%3E%3Cpath d='M4 6l4 4 4-4'\/%3E%3C\/svg%3E\");background-repeat:no-repeat;background-position:right 10px center}.vc-select:focus,.vc-input:focus{outline:none;border-color:var(--vc-accent);box-shadow:0 0 0 3px rgba(200,90,42,0.12)}.vc-select:hover,.vc-input:hover{border-color:var(--vc-ink-muted)}\n.vc-presets{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px;padding-top:18px;border-top:1px solid var(--vc-border-light)}.vc-presets-label{font-family:var(--vc-mono);font-size:11px;font-weight:500;letter-spacing:0.1em;text-transform:uppercase;color:var(--vc-ink-muted);width:100%;margin-bottom:2px}.vc-preset-btn{padding:5px 12px;font-family:var(--vc-font);font-size:12px;font-weight:500;border:1px solid var(--vc-border);border-radius:6px;background:var(--vc-surface-alt);color:var(--vc-ink-secondary);cursor:pointer;transition:all 0.15s}.vc-preset-btn:hover{border-color:var(--vc-accent);color:var(--vc-accent);background:var(--vc-accent-light)}\n.vc-results{border-top:1px solid var(--vc-border-light);background:var(--vc-surface-alt);padding:0;max-height:0;overflow:hidden;transition:max-height 0.5s cubic-bezier(0.4,0,0.2,1),padding 0.3s}.vc-results.vc-visible{max-height:2000px;padding:24px}.vc-results-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}.vc-results-title{font-family:var(--vc-display);font-size:20px;font-weight:700;color:var(--vc-ink);margin:0}.vc-copy-btn{display:inline-flex;align-items:center;gap:5px;padding:6px 12px;border:1px solid var(--vc-border);border-radius:6px;background:var(--vc-surface);font-family:var(--vc-font);font-size:12px;font-weight:500;color:var(--vc-ink-secondary);cursor:pointer;transition:all 0.15s}.vc-copy-btn:hover{border-color:var(--vc-accent);color:var(--vc-accent)}.vc-copy-btn.vc-copied{background:var(--vc-green-light);border-color:var(--vc-green);color:var(--vc-green)}\n.vc-result-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-bottom:20px}@media(max-width:500px){.vc-result-grid{grid-template-columns:1fr}}.vc-rcard{background:var(--vc-surface);border:1px solid var(--vc-border-light);border-radius:var(--vc-radius);padding:16px;transition:transform 0.2s}.vc-rcard:hover{transform:translateY(-1px)}.vc-rcard-primary{border-color:var(--vc-accent);border-width:2px;background:linear-gradient(135deg,#fdf6f2 0%,var(--vc-surface) 100%);grid-column:1\/-1}.vc-rcard-label{font-family:var(--vc-mono);font-size:10px;font-weight:500;letter-spacing:0.1em;text-transform:uppercase;color:var(--vc-ink-muted);margin-bottom:4px}.vc-rcard-value{font-family:var(--vc-mono);font-size:22px;font-weight:600;color:var(--vc-ink);line-height:1.2}.vc-rcard-primary .vc-rcard-value{font-size:30px;color:var(--vc-accent)}.vc-rcard-unit{font-size:14px;font-weight:400;color:var(--vc-ink-secondary)}\n.vc-section{margin-top:24px;border:1px solid var(--vc-border);border-radius:var(--vc-radius-lg);background:var(--vc-surface);box-shadow:var(--vc-shadow);overflow:hidden}.vc-section-toggle{width:100%;display:flex;align-items:center;justify-content:space-between;padding:18px 24px;border:none;background:transparent;cursor:pointer;font-family:var(--vc-font);text-align:left;transition:background 0.15s}.vc-section-toggle:hover{background:var(--vc-surface-alt)}.vc-section-toggle-text{display:flex;align-items:center;gap:10px}.vc-section-icon{font-size:20px;line-height:1}.vc-section-title{font-family:var(--vc-display);font-size:18px;font-weight:700;color:var(--vc-ink);margin:0}.vc-section-chevron{width:20px;height:20px;color:var(--vc-ink-muted);transition:transform 0.3s;flex-shrink:0}.vc-section.vc-open .vc-section-chevron{transform:rotate(180deg)}.vc-section-body{max-height:0;overflow:hidden;transition:max-height 0.4s cubic-bezier(0.4,0,0.2,1)}.vc-section.vc-open .vc-section-body{max-height:20000px}.vc-section-inner{padding:0 24px 24px;border-top:1px solid var(--vc-border-light)}\n.vc-theory h3{font-family:var(--vc-display);font-size:17px;font-weight:700;color:var(--vc-ink);margin:28px 0 10px}.vc-theory h3:first-child{margin-top:20px}.vc-theory p{font-size:14px;color:var(--vc-ink-secondary);margin:0 0 10px}.vc-theory ul,.vc-theory ol{font-size:14px;color:var(--vc-ink-secondary);margin:0 0 12px 18px;padding:0}.vc-theory li{margin-bottom:5px}.vc-formula-box{background:var(--vc-surface-alt);border:2px solid var(--vc-border);border-radius:6px;padding:14px 20px;font-family:var(--vc-mono);font-size:16px;font-weight:500;text-align:center;margin:14px 0;color:var(--vc-ink);overflow-x:auto}.vc-info-box{background:var(--vc-blue-light);border-left:3px solid var(--vc-blue);padding:14px 16px;border-radius:0 6px 6px 0;margin:14px 0}.vc-info-box p{margin:0;font-size:14px;color:var(--vc-ink-secondary)}.vc-warning-box{background:var(--vc-yellow-light);border-left:3px solid var(--vc-yellow);padding:14px 16px;border-radius:0 6px 6px 0;margin:14px 0}.vc-example-box{background:var(--vc-surface-alt);border:1px solid var(--vc-border-light);border-radius:6px;padding:16px;margin:14px 0}.vc-example-title{font-family:var(--vc-mono);font-size:13px;font-weight:600;color:var(--vc-accent);margin-bottom:8px}\n.vc-table{width:100%;border-collapse:collapse;margin:14px 0;font-size:13px}.vc-table th,.vc-table td{padding:10px 12px;border:1px solid var(--vc-border-light);text-align:left}.vc-table th{background:var(--vc-surface-alt);font-size:11px;font-weight:600;text-transform:uppercase;letter-spacing:0.05em;color:var(--vc-ink-secondary)}.vc-table tr:nth-child(even){background:var(--vc-surface-alt)}@media(max-width:600px){.vc-table{font-size:12px}.vc-table th,.vc-table td{padding:8px}}\n.vc-faq-list{display:flex;flex-direction:column;gap:8px;margin-top:20px}.vc-faq-item{border:1px solid var(--vc-border-light);border-radius:6px;overflow:hidden}.vc-faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:12px;padding:14px 16px;border:none;background:var(--vc-surface-alt);cursor:pointer;font-family:var(--vc-font);font-size:15px;font-weight:600;color:var(--vc-ink);text-align:left;transition:background 0.15s}.vc-faq-q:hover{background:#ede9e3}.vc-faq-chevron{width:16px;height:16px;color:var(--vc-ink-muted);flex-shrink:0;transition:transform 0.25s}.vc-faq-item.vc-open .vc-faq-chevron{transform:rotate(180deg)}.vc-faq-a{max-height:0;overflow:hidden;transition:max-height 0.35s}.vc-faq-item.vc-open .vc-faq-a{max-height:1200px}.vc-faq-a-inner{padding:14px 16px;border-top:1px solid var(--vc-border-light);font-size:14px;color:var(--vc-ink-secondary)}.vc-faq-a-inner p{margin:0 0 8px}.vc-faq-a-inner p:last-child{margin-bottom:0}.vc-faq-a-inner ul{margin:4px 0 8px 16px;padding:0}.vc-faq-a-inner li{margin-bottom:3px}\n.vc-related{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px}.vc-related-link{display:inline-block;padding:8px 16px;font-family:var(--vc-font);font-size:13px;font-weight:600;background:var(--vc-surface-alt);color:var(--vc-ink-secondary);border:1px solid var(--vc-border);border-radius:var(--vc-radius);text-decoration:none;transition:all 0.15s}.vc-related-link:hover{border-color:var(--vc-accent);color:var(--vc-accent);background:var(--vc-accent-light)}\n.vc-promo{margin-top:24px;padding:20px;background:linear-gradient(135deg,var(--vc-accent-light),var(--vc-surface));border:1px solid var(--vc-border);border-radius:var(--vc-radius-lg);display:flex;align-items:center;gap:16px}.vc-promo-text{flex:1;font-size:14px;color:var(--vc-ink-secondary)}.vc-promo-text strong{color:var(--vc-ink)}.vc-promo-link{padding:8px 20px;font-size:13px;font-weight:700;color:#fff;background:var(--vc-accent);border-radius:var(--vc-radius);text-decoration:none;white-space:nowrap;transition:background 0.15s}.vc-promo-link:hover{background:var(--vc-accent-hover)}\n.vc-footer{text-align:center;padding:32px 16px;font-size:13px;color:var(--vc-ink-muted)}.vc-footer a{color:var(--vc-accent);text-decoration:none}.vc-footer a:hover{text-decoration:underline}.vc-footer-links{margin-top:8px;font-size:12px}.vc-footer-links a{margin:0 8px}\n@media print{.vc-section-body{max-height:none!important}.vc-faq-a{max-height:none!important}.vc-results{max-height:none!important;padding:24px!important}.vc-copy-btn,.vc-section-chevron,.vc-faq-chevron,.vc-presets,.vc-promo{display:none!important}}\n<\/style>\n\n<div class=\"vc-calculator\" id=\"vc-proximity-probe\">\n<header class=\"vc-header\">\n    <p class=\"vc-header-eyebrow\">Free Engineering Tool \u2014 #031<\/p>\n    <h1 class=\"vc-header-title\">Proximity Probe Gap Voltage Calculator<\/h1>\n    <p class=\"vc-header-subtitle\">Calculate eddy current probe gap voltage, gap distance from voltage, and verify linear operating range. For shaft vibration and position measurement setup per API 670.<\/p>\n    <div class=\"vc-badges\"><span class=\"vc-badge\">API 670<\/span><span class=\"vc-badge\">Eddy Current<\/span><span class=\"vc-badge\">Gap Voltage<\/span><\/div>\n<\/header>\n\n<div class=\"vc-card\">\n    <form class=\"vc-form\" id=\"vc-form\" autocomplete=\"off\">\n        <div class=\"vc-form-grid\">\n            <div class=\"vc-field\"><label class=\"vc-label\" for=\"vc-gap\">Gap Distance <span class=\"vc-label-hint\">(mm)<\/span><\/label><input class=\"vc-input\" type=\"number\" id=\"vc-gap\" inputmode=\"decimal\" step=\"any\" min=\"0\" placeholder=\"e.g. 1.27\" value=\"1.27\"><\/div>\n            <div class=\"vc-field\"><label class=\"vc-label\" for=\"vc-sens\">Sensitivity Factor <span class=\"vc-label-hint\">(mV\/\u03bcm)<\/span><\/label><input class=\"vc-input\" type=\"number\" id=\"vc-sens\" inputmode=\"decimal\" step=\"any\" min=\"0.1\" placeholder=\"e.g. 7.87\" value=\"7.87\"><\/div>\n            <div class=\"vc-field\"><label class=\"vc-label\" for=\"vc-probe\">Probe Size<\/label><select class=\"vc-select\" id=\"vc-probe\"><option value=\"5\">5 mm (3300 series)<\/option><option value=\"8\" selected>8 mm (3300 series \u2014 standard)<\/option><option value=\"12\">12 mm (for large gaps)<\/option><\/select><\/div>\n            <div class=\"vc-field\"><label class=\"vc-label\" for=\"vc-material\">Target Material<\/label><select class=\"vc-select\" id=\"vc-material\"><option value=\"1.0\" selected>4140 Steel (standard cal)<\/option><option value=\"0.85\">Stainless Steel (304)<\/option><option value=\"0.60\">Titanium<\/option><option value=\"0.50\">Brass<\/option><option value=\"0.40\">Aluminum<\/option><\/select><\/div>\n        <\/div>\n        <div class=\"vc-presets\">\n            <div class=\"vc-presets-label\">Quick presets<\/div>\n            <button type=\"button\" class=\"vc-preset-btn\" data-g=\"1.27\" data-s=\"7.87\" data-p=\"8\" data-m=\"1.0\">API 670 standard (\u221210 V target)<\/button>\n            <button type=\"button\" class=\"vc-preset-btn\" data-g=\"0.75\" data-s=\"7.87\" data-p=\"8\" data-m=\"1.0\">Close gap 0.75 mm<\/button>\n            <button type=\"button\" class=\"vc-preset-btn\" data-g=\"2.0\" data-s=\"7.87\" data-p=\"8\" data-m=\"1.0\">Wide gap 2.0 mm<\/button>\n        <\/div>\n    <\/form>\n\n    <div class=\"vc-results\" id=\"vc-results\">\n        <div class=\"vc-results-head\"><h2 class=\"vc-results-title\">Results<\/h2><button type=\"button\" class=\"vc-copy-btn\" id=\"vc-copy-btn\"><svg width=\"14\" height=\"14\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><rect x=\"9\" y=\"9\" width=\"13\" height=\"13\" rx=\"2\"\/><path d=\"M5 15H4a2 2 0 01-2-2V4a2 2 0 012-2h9a2 2 0 012 2v1\"\/><\/svg> Copy<\/button><\/div>\n        <div class=\"vc-result-grid\">\n            <div class=\"vc-rcard vc-rcard-primary\"><div class=\"vc-rcard-label\">Gap Voltage (DC)<\/div><div class=\"vc-rcard-value\" id=\"vc-r-voltage\">\u2014<\/div><\/div>\n            <div class=\"vc-rcard\"><div class=\"vc-rcard-label\">Gap Distance<\/div><div class=\"vc-rcard-value\" id=\"vc-r-gap\">\u2014<\/div><\/div>\n            <div class=\"vc-rcard\"><div class=\"vc-rcard-label\">Linear Range<\/div><div class=\"vc-rcard-value\" id=\"vc-r-range\">\u2014<\/div><\/div>\n            <div class=\"vc-rcard\"><div class=\"vc-rcard-label\">In Linear Range?<\/div><div class=\"vc-rcard-value\" id=\"vc-r-inrange\">\u2014<\/div><\/div>\n            <div class=\"vc-rcard\"><div class=\"vc-rcard-label\">Effective Sensitivity<\/div><div class=\"vc-rcard-value\" id=\"vc-r-effsens\">\u2014<\/div><\/div>\n        <\/div>\n    <\/div>\n<\/div>\n\n<div class=\"vc-section vc-open\" id=\"vc-sec-theory\">\n    <button type=\"button\" class=\"vc-section-toggle\" aria-expanded=\"true\"><span class=\"vc-section-toggle-text\"><span class=\"vc-section-icon\">\ud83d\udcd8<\/span><span class=\"vc-section-title\">Theory &amp; Formulas<\/span><\/span><svg class=\"vc-section-chevron\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M6 9l6 6 6-6\"\/><\/svg><\/button>\n    <div class=\"vc-section-body\">\n        <div class=\"vc-section-inner vc-theory\">\n            <h3>Gap Voltage Relationship<\/h3>\n            <div class=\"vc-formula-box\" id=\"vc-katex-1\"><\/div>\n            <p>Output is negative voltage (closer gap \u2192 more negative). Standard sensitivity: 7.87 mV\/\u03bcm = 200 mV\/mil.<\/p>\n            <h3>Linear Ranges by Probe Size<\/h3>\n            <table class=\"vc-table\">\n                <thead><tr><th>Probe<\/th><th>Linear Range (mm)<\/th><th>Linear Range (mil)<\/th><th>Voltage Range<\/th><\/tr><\/thead>\n                <tbody>\n                    <tr><td>5 mm<\/td><td>0.25 \u2013 1.30<\/td><td>10 \u2013 50<\/td><td>\u22122 to \u221210 V<\/td><\/tr>\n                    <tr><td>8 mm<\/td><td>0.25 \u2013 2.30<\/td><td>10 \u2013 90<\/td><td>\u22122 to \u221218 V<\/td><\/tr>\n                    <tr><td>12 mm<\/td><td>0.50 \u2013 4.00<\/td><td>20 \u2013 160<\/td><td>\u22124 to \u221232 V<\/td><\/tr>\n                <\/tbody>\n            <\/table>\n            <div class=\"vc-example-box\">\n                <div class=\"vc-example-title\">Example \u2014 Standard API 670 Setup<\/div>\n                <p><strong>Given:<\/strong> 8 mm probe, 7.87 mV\/\u03bcm, 4140 steel target<\/p>\n                <p>Target gap = 1.27 mm = 1270 \u03bcm \u2192 V = \u22127.87 \u00d7 1270 \/ 1000 = <strong>\u22129.99 V DC \u2248 \u221210 V<\/strong><\/p>\n                <p>Linear range: 0.25\u20132.30 mm \u2192 1.27 mm is centered \u2713<\/p>\n            <\/div>\n            <div class=\"vc-warning-box\"><p style=\"margin:0;font-size:14px;color:var(--vc-ink-secondary);\"><strong>\u26a0\ufe0f Note:<\/strong> Non-steel targets require sensitivity correction. Operating outside the linear range causes measurement errors &gt; 5%.<\/p><\/div>\n        <\/div>\n    <\/div>\n<\/div>\n\n<div class=\"vc-section\" id=\"vc-sec-related\">\n    <button type=\"button\" class=\"vc-section-toggle\" aria-expanded=\"false\"><span class=\"vc-section-toggle-text\"><span class=\"vc-section-icon\">\ud83d\udd17<\/span><span class=\"vc-section-title\">Related Calculators<\/span><\/span><svg class=\"vc-section-chevron\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M6 9l6 6 6-6\"\/><\/svg><\/button>\n    <div class=\"vc-section-body\"><div class=\"vc-section-inner\"><div class=\"vc-related\">\n        <a class=\"vc-related-link\" href=\"\/calculators\/vibration-sensor-sensitivity\/\">Sensor Sensitivity<\/a>\n        <a class=\"vc-related-link\" href=\"\/calculators\/condition-monitoring-iso13373\/\">Condition Monitoring (ISO 13373)<\/a>\n        <a class=\"vc-related-link\" href=\"\/calculators\/vibration-overall-level\/\">Overall Vibration Level<\/a>\n        <a class=\"vc-related-link\" href=\"\/calculators\/vibration-phase-angle\/\">Phase Angle Calculator<\/a>\n    <\/div><\/div><\/div>\n<\/div>\n\n<div class=\"vc-section\" id=\"vc-sec-faq\">\n    <button type=\"button\" class=\"vc-section-toggle\" aria-expanded=\"false\"><span class=\"vc-section-toggle-text\"><span class=\"vc-section-icon\">\u2753<\/span><span class=\"vc-section-title\">Frequently Asked Questions<\/span><\/span><svg class=\"vc-section-chevron\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M6 9l6 6 6-6\"\/><\/svg><\/button>\n    <div class=\"vc-section-body\"><div class=\"vc-section-inner\"><div class=\"vc-faq-list\" id=\"vc-faq-list\"><\/div><\/div><\/div>\n<\/div>\n\n<div class=\"vc-promo\"><div class=\"vc-promo-text\"><strong>Vibromera \u2014 Portable Balancing &amp; Vibration Analysis<\/strong><br>Professional vibration measurement and shaft monitoring solutions. Proximity probe compatible instruments. Used in 50+ countries.<\/div><a class=\"vc-promo-link\" href=\"https:\/\/vibromera.eu\/\" target=\"_blank\" rel=\"noopener\">Learn More<\/a><\/div>\n\n<footer class=\"vc-footer\"><p>\u00a9 2024\u20132025 <a href=\"https:\/\/vibromera.eu\/\">Vibromera<\/a> \u2014 Engineering Calculators<\/p><p style=\"font-size:12px;margin-top:4px;\">Proximity probe gap voltage calculator. Last updated: February 2025<\/p><div class=\"vc-footer-links\"><a href=\"\/calculators\/engineering-calculators\/\">All Calculators<\/a><a href=\"https:\/\/vibromera.eu\/contacts\/\">Contact<\/a><\/div><\/footer>\n<\/div>\n\n<script src=\"https:\/\/cdn.jsdelivr.net\/npm\/katex@0.16.11\/dist\/katex.min.js\"><\/script>\n<script>\n(function(){\n    'use strict';\n    var SLUG='proximity-probe-setup';\n    function $(id){return document.getElementById(id)}\n    function fmt(n,d){if(isNaN(n)||!isFinite(n))return '\u2014';return n.toFixed(d===undefined?2:d).replace(\/(\\.\\d*?)0+$\/,'$1').replace(\/\\.$\/,'')}\n\n    var ranges={'5':[0.25,1.30],'8':[0.25,2.30],'12':[0.50,4.00]};\n\n    function calculate(){\n        var gap=parseFloat($('vc-gap').value);\n        var sens=parseFloat($('vc-sens').value);\n        var probe=$('vc-probe').value;\n        var matFactor=parseFloat($('vc-material').value);\n        if(!gap||gap<0||!sens||sens<=0){$('vc-results').classList.remove('vc-visible');return}\n\n        var effSens=sens*matFactor;\n        var gapUm=gap*1000;\n        var voltage=-(effSens*gapUm)\/1000; \/\/ V\n        var gapMil=gap\/0.0254;\n        var r=ranges[probe];\n        var inRange=gap>=r[0]&&gap<=r[1];\n\n        $('vc-r-voltage').innerHTML=fmt(voltage,2)+' <span class=\"vc-rcard-unit\">V DC<\/span>';\n        $('vc-r-gap').innerHTML=fmt(gap,3)+' <span class=\"vc-rcard-unit\">mm<\/span> <span class=\"vc-rcard-unit\">('+fmt(gapMil,1)+' mil)<\/span>';\n        $('vc-r-range').innerHTML=fmt(r[0],2)+'\u2013'+fmt(r[1],2)+' <span class=\"vc-rcard-unit\">mm<\/span>';\n        $('vc-r-inrange').innerHTML=inRange?'<span style=\"color:var(--vc-green)\">YES \u2713<\/span>':'<span style=\"color:var(--vc-red)\">NO \u2014 Outside linear range<\/span>';\n        $('vc-r-effsens').innerHTML=fmt(effSens,2)+' <span class=\"vc-rcard-unit\">mV\/\u03bcm<\/span>'+(matFactor<1?' <span class=\"vc-rcard-unit\">(corrected)<\/span>':'');\n        $('vc-results').classList.add('vc-visible');\n        saveHistory({gap:gap,voltage:fmt(voltage,2),probe:probe,_summary:gap+'mm \u2192 '+fmt(voltage,2)+'V, '+(inRange?'in range':'OUT OF RANGE')});\n    }\n\n    document.querySelectorAll('.vc-preset-btn').forEach(function(btn){btn.addEventListener('click',function(e){e.preventDefault();$('vc-gap').value=this.getAttribute('data-g');$('vc-sens').value=this.getAttribute('data-s');$('vc-probe').value=this.getAttribute('data-p');$('vc-material').value=this.getAttribute('data-m');calculate()})});\n    $('vc-form').addEventListener('input',calculate);$('vc-form').addEventListener('change',calculate);\n\n    $('vc-copy-btn').addEventListener('click',function(){var text='Proximity Probe Setup\\n\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\\nGap: '+$('vc-r-gap').textContent+'\\nVoltage: '+$('vc-r-voltage').textContent+'\\nLinear Range: '+$('vc-r-range').textContent+'\\nIn Range: '+$('vc-r-inrange').textContent+'\\n\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\\nvibromera.eu\/calculators\/proximity-probe-setup\/';if(navigator.clipboard){navigator.clipboard.writeText(text).then(function(){var b=$('vc-copy-btn');b.classList.add('vc-copied');b.innerHTML='<svg width=\"14\" height=\"14\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><polyline points=\"20 6 9 17 4 12\"\/><\/svg> Copied!';setTimeout(function(){b.classList.remove('vc-copied');b.innerHTML='<svg width=\"14\" height=\"14\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><rect x=\"9\" y=\"9\" width=\"13\" height=\"13\" rx=\"2\"\/><path d=\"M5 15H4a2 2 0 01-2-2V4a2 2 0 012-2h9a2 2 0 012 2v1\"\/><\/svg> Copy'},2000)})}});\n\n    document.querySelectorAll('.vc-section-toggle').forEach(function(btn){btn.addEventListener('click',function(){var s=this.closest('.vc-section');s.classList.toggle('vc-open');this.setAttribute('aria-expanded',s.classList.contains('vc-open'))})});\n\n    var faqData=[\n        {q:'How does an eddy current proximity probe work?',a:'<p>A high-frequency magnetic field is generated by the probe. When a conductive target enters this field, eddy currents change the probe impedance. The proximitor converts this to a voltage proportional to gap distance.<\/p>'},\n        {q:'What is the standard sensitivity?',a:'<p>200 mV\/mil = 7.87 mV\/\u03bcm for API 670 systems. European: 8 mV\/\u03bcm. The relationship is linear within the specified range. Calibrated for 4140 steel.<\/p>'},\n        {q:'What is the normal gap voltage setting?',a:'<p>API 670 recommends \u221210V DC (\u224850 mil = 1.27 mm) for standard 8mm\/200 mV\/mil probes. This centers measurement in the linear range for maximum dynamic range.<\/p>'},\n        {q:'What is the linear range?',a:'<p>8mm probes: 0.25\u20132.3 mm. 5mm: 0.25\u20131.3 mm. 12mm: 0.5\u20134.0 mm. Output is linear within \u00b15% in this range. Outside: errors increase rapidly.<\/p>'},\n        {q:'What target material affects sensitivity?',a:'<p>Calibrated for 4140 steel. Correction factors: stainless 304 \u2248 0.85\u00d7, titanium \u2248 0.60\u00d7, brass \u2248 0.50\u00d7, aluminum \u2248 0.40\u00d7. Apply factor to sensitivity.<\/p>'}\n    ];\n    var fl=$('vc-faq-list');faqData.forEach(function(f){fl.innerHTML+='<div class=\"vc-faq-item\"><button type=\"button\" class=\"vc-faq-q\"><span>'+f.q+'<\/span><svg class=\"vc-faq-chevron\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M6 9l6 6 6-6\"\/><\/svg><\/button><div class=\"vc-faq-a\"><div class=\"vc-faq-a-inner\">'+f.a+'<\/div><\/div><\/div>'});\n    fl.addEventListener('click',function(e){var b=e.target.closest('.vc-faq-q');if(!b)return;b.closest('.vc-faq-item').classList.toggle('vc-open')});\n\n    function saveHistory(entry){var key='vc_history_'+SLUG;var arr=[];try{arr=JSON.parse(localStorage.getItem(key))||[]}catch(e){}entry._ts=new Date().toISOString();arr.unshift(entry);if(arr.length>10)arr=arr.slice(0,10);try{localStorage.setItem(key,JSON.stringify(arr))}catch(e){}}\n\n    function renderFormulas(){try{katex.render('V_{gap}=-S_{eff}\\\\times d\\\\;[\\\\text{V}], \\\\quad S_{eff}=S_{cal}\\\\times k_{material}',$('vc-katex-1'),{displayMode:true,throwOnError:false})}catch(e){}}\n\n    function init(){renderFormulas();calculate()}\n    if(document.readyState==='loading'){document.addEventListener('DOMContentLoaded',init)}else{init()}\n})();\n<\/script>\n","protected":false},"excerpt":{"rendered":"<p>Libreng online na calculator ng gap voltage para sa eddy current proximity probe. Kalkulahin ang distansya ng gap, output voltage, at linear range para sa mga pagsukat ng shaft vibration at posisyon.<\/p>","protected":false},"featured_media":0,"template":"","meta":{"ai_generated_summary":"","footnotes":""},"categories":[],"tags":[],"class_list":["post-100200","calculator","type-calculator","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/vibromera.eu\/tl\/wp-json\/wp\/v2\/calculator\/100200","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vibromera.eu\/tl\/wp-json\/wp\/v2\/calculator"}],"about":[{"href":"https:\/\/vibromera.eu\/tl\/wp-json\/wp\/v2\/types\/calculator"}],"version-history":[{"count":2,"href":"https:\/\/vibromera.eu\/tl\/wp-json\/wp\/v2\/calculator\/100200\/revisions"}],"predecessor-version":[{"id":100914,"href":"https:\/\/vibromera.eu\/tl\/wp-json\/wp\/v2\/calculator\/100200\/revisions\/100914"}],"wp:attachment":[{"href":"https:\/\/vibromera.eu\/tl\/wp-json\/wp\/v2\/media?parent=100200"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vibromera.eu\/tl\/wp-json\/wp\/v2\/categories?post=100200"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vibromera.eu\/tl\/wp-json\/wp\/v2\/tags?post=100200"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}