{"id":2973,"date":"2021-01-27T21:49:48","date_gmt":"2021-01-27T14:49:48","guid":{"rendered":"http:\/\/robot3t.com\/?post_type=product&#038;p=2973"},"modified":"2026-10-15T11:04:27","modified_gmt":"2026-10-15T04:04:27","slug":"os3t-01-ohmic-sensor-for-cnc-plasma-cutting","status":"publish","type":"product","link":"https:\/\/robot3t.com\/en\/san-pham\/os3t-01-ohmic-sensor-for-cnc-plasma-cutting\/","title":{"rendered":"OS3T-01 Ohmic Sensor for CNC Plasma Cutting"},"content":{"rendered":"<div class=\"r3-keyspecs\">\n<div><strong>12\u201324 VDC<\/strong><span>Power supply<\/span><\/div>\n<div><strong>0\u20131 M\u03a9<\/strong><span>Sensing range<\/span><\/div>\n<div><strong>PNP<\/strong><span>Isolated output<\/span><\/div>\n<div><strong>660 VDC<\/strong><span>Arc \/ HF protected<\/span><\/div>\n<\/div>\n<p>OS3T-01 is an ohmic sensor that lets your CNC plasma cutter find the plate surface accurately before every pierce. It detects the electrical contact between the torch shield and the metal plate, so the machine knows the exact initial height without pressing on the material \u2013 faster and more precise than mechanical touch-off on thin or flexible sheet. Built for the harsh plasma environment, it withstands high-frequency and high-voltage starting sparks up to 660 VDC, and its isolated PNP output connects safely to the CNC controller. Sensitivity is adjustable to suit dirty, coated or oily plates. Designed and built by Robot3T in Vietnam.<\/p>\n<a href=\"\/en\/contact\/\" class=\"button primary\" style=\"border-radius:99px;\">\n\t\t<span>Request a quote<\/span>\n\t<\/a>\n <a href=\"https:\/\/wa.me\/84974908615\" class=\"button primary is-outline\" style=\"border-radius:99px;\">\n\t\t<span>WhatsApp +84 974 908 615<\/span>\n\t<\/a>\n\n<h3 class=\"r3-spec-title\">Typical applications<\/h3>\n<ul>\n<li><strong>Initial height sensing (IHS):<\/strong> accurate pierce height on every cut for CNC plasma tables.<\/li>\n<li><strong>Thin and flexible sheet:<\/strong> touch-off without bending the plate.<\/li>\n<li><strong>Torch height control systems:<\/strong> works together with THC3T-02 controllers.<\/li>\n<li><strong>Machine builders and retrofits:<\/strong> adding ohmic sensing to new or existing plasma machines.<\/li>\n<\/ul>\n<h3 class=\"r3-spec-title\">Why OS3T-01<\/h3>\n<ul>\n<li><strong>Built for plasma<\/strong> \u2013 survives HF and HV starting sparks, arc voltage input up to 660 VDC.<\/li>\n<li><strong>Accurate and fast<\/strong> \u2013 electrical contact sensing finds the plate surface without mechanical force.<\/li>\n<li><strong>Safe connection<\/strong> \u2013 isolated PNP output protects the CNC controller.<\/li>\n<li><strong>Adjustable sensitivity<\/strong> \u2013 reliable on clean, rusty, coated or oily plates.<\/li>\n<li><strong>Long life<\/strong> \u2013 output relay rated for at least 10<sup>8<\/sup> operations at 24 V \/ 16 mA.<\/li>\n<li><strong>Robust power input<\/strong> \u2013 12\u201324 VDC with built-in reverse-voltage protection.<\/li>\n<\/ul>\n<h3 class=\"r3-spec-title\">Specifications<\/h3>\n<div class=\"r3-spec\">\n<table>\n<tbody>\n<tr>\n<td>Model<\/td>\n<td>OS3T-01<\/td>\n<\/tr>\n<tr>\n<td>Power supply<\/td>\n<td>12\u201324 VDC, 0.1 A<\/td>\n<\/tr>\n<tr>\n<td>Reverse voltage protection<\/td>\n<td>Integrated<\/td>\n<\/tr>\n<tr>\n<td>Sensing range<\/td>\n<td>0\u20131 M\u03a9<\/td>\n<\/tr>\n<tr>\n<td>Sensitivity<\/td>\n<td>Adjustable<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<table>\n<tbody>\n<tr>\n<td>Output<\/td>\n<td>Isolated PNP<\/td>\n<\/tr>\n<tr>\n<td>Relay life<\/td>\n<td>\u2265 10<sup>8<\/sup> operations (24 V \/ 16 mA)<\/td>\n<\/tr>\n<tr>\n<td>HV \/ HF protection<\/td>\n<td>Arc voltage input up to 660 VDC, HF ionizing voltage<\/td>\n<\/tr>\n<tr>\n<td>Origin<\/td>\n<td>Robot3T, Vietnam<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<h3 class=\"r3-spec-title\">Product and wiring<\/h3>\n<div class=\"row align-middle\"  id=\"row-820397280\">\n\n\t<div id=\"col-1091437605\" class=\"col medium-4 small-12 large-4\"  >\n\t\t\t\t<div class=\"col-inner text-center\"  >\n\t\t\t\n\t\t\t\n\t<div class=\"img has-hover x md-x lg-x y md-y lg-y\" id=\"image_28908559\">\n\t\t<a class=\"image-lightbox lightbox-gallery\" title=\"\" href=\"https:\/\/robot3t.com\/wp-content\/uploads\/2019\/04\/z1393202604277_cdc723c5349043652aeb2ff26a1abc06-800x800.jpg\">\t\t\t\t\t\t<div class=\"img-inner dark\" >\n\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"800\" src=\"https:\/\/robot3t.com\/wp-content\/uploads\/2019\/04\/z1393202604277_cdc723c5349043652aeb2ff26a1abc06-800x800.jpg\" class=\"attachment-large size-large\" alt=\"\" srcset=\"https:\/\/robot3t.com\/wp-content\/uploads\/2019\/04\/z1393202604277_cdc723c5349043652aeb2ff26a1abc06-800x800.jpg 800w, https:\/\/robot3t.com\/wp-content\/uploads\/2019\/04\/z1393202604277_cdc723c5349043652aeb2ff26a1abc06-400x400.jpg 400w, https:\/\/robot3t.com\/wp-content\/uploads\/2019\/04\/z1393202604277_cdc723c5349043652aeb2ff26a1abc06-768x768.jpg 768w, https:\/\/robot3t.com\/wp-content\/uploads\/2019\/04\/z1393202604277_cdc723c5349043652aeb2ff26a1abc06-300x300.jpg 300w, https:\/\/robot3t.com\/wp-content\/uploads\/2019\/04\/z1393202604277_cdc723c5349043652aeb2ff26a1abc06-600x600.jpg 600w, https:\/\/robot3t.com\/wp-content\/uploads\/2019\/04\/z1393202604277_cdc723c5349043652aeb2ff26a1abc06-100x100.jpg 100w, https:\/\/robot3t.com\/wp-content\/uploads\/2019\/04\/z1393202604277_cdc723c5349043652aeb2ff26a1abc06.jpg 2000w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/>\t\t\t\t\t\t\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/a>\t\t\n<style>\n#image_28908559 {\n  width: 100%;\n}\n<\/style>\n\t<\/div>\n\t\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\n\t\n\n\t<div id=\"col-126068542\" class=\"col medium-8 small-12 large-8\"  >\n\t\t\t\t<div class=\"col-inner\"  >\n\t\t\t\n\t\t\t\n\t<div class=\"img has-hover x md-x lg-x y md-y lg-y\" id=\"image_1434484564\">\n\t\t<a class=\"image-lightbox lightbox-gallery\" title=\"\" href=\"https:\/\/robot3t.com\/wp-content\/uploads\/2019\/04\/ohmic-sensor.jpg\">\t\t\t\t\t\t<div class=\"img-inner dark\" >\n\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1020\" height=\"332\" src=\"https:\/\/robot3t.com\/wp-content\/uploads\/2019\/04\/ohmic-sensor.jpg\" class=\"attachment-large size-large\" alt=\"\" srcset=\"https:\/\/robot3t.com\/wp-content\/uploads\/2019\/04\/ohmic-sensor.jpg 1080w, https:\/\/robot3t.com\/wp-content\/uploads\/2019\/04\/ohmic-sensor-800x261.jpg 800w, https:\/\/robot3t.com\/wp-content\/uploads\/2019\/04\/ohmic-sensor-768x250.jpg 768w, https:\/\/robot3t.com\/wp-content\/uploads\/2019\/04\/ohmic-sensor-600x196.jpg 600w\" sizes=\"auto, (max-width: 1020px) 100vw, 1020px\" \/>\t\t\t\t\t\t\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/a>\t\t\n<style>\n#image_1434484564 {\n  width: 100%;\n}\n<\/style>\n\t<\/div>\n\t\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\n\t\n<\/div>\n<h3 class=\"r3-spec-title\">Documentation<\/h3>\n<a href=\"https:\/\/drive.google.com\/file\/d\/1fw3yVJEEzpONH1tOdG57mZM7uOIIshna\/view?usp=sharing\" target=\"_blank\" class=\"button primary is-outline\" rel=\"noopener\" style=\"border-radius:99px;\">\n\t\t<span>Download user manual<\/span>\n\t<i class=\"icon-download\" aria-hidden=\"true\"><\/i><\/a>\n\n<h3 class=\"r3-spec-title\">See it in action<\/h3>\n<div class=\"row align-middle r3-video-row\"  id=\"row-8699390\">\n\n\t<div id=\"col-1453124434\" class=\"col medium-7 small-12 large-7\"  >\n\t\t\t\t<div class=\"col-inner\"  >\n\t\t\t\n\t\t\t\n<div class=\"video video-fit mb\" style=\"padding-top:56.25%;\"><p><iframe loading=\"lazy\" title=\"OS3T-01 Ohmic Sensor for CNC Plasma Cutting\" width=\"1020\" height=\"574\" src=\"https:\/\/www.youtube.com\/embed\/tvQa0U2jd8U?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><\/p>\n<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\n\t\n\n\t<div id=\"col-2044777628\" class=\"col medium-5 small-12 large-5\"  >\n\t\t\t\t<div class=\"col-inner\"  >\n\t\t\t\n\t\t\t\n<p class=\"r3-video-cap\"><strong>Ohmic touch-off before every pierce<\/strong><\/p>\n<ul>\n<li>Torch shield touches the plate \u2013 signal sent instantly.<\/li>\n<li>Correct pierce height, longer consumable life.<\/li>\n<li>Reliable despite plasma HF and HV sparks.<\/li>\n<\/ul>\n<a href=\"\/en\/contact\/\" class=\"button primary is-outline\" style=\"border-radius:99px;\">\n\t\t<span>Ask an engineer<\/span>\n\t<\/a>\n\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\n\t\n<\/div>\n<h3 class=\"r3-spec-title\">Frequently asked questions<\/h3>\n<p><strong>Do I need an ohmic sensor if I have a THC?<\/strong><br \/>Yes, they do different jobs. The ohmic sensor sets the correct initial height before piercing; the THC keeps the height constant while cutting. Together they give the best cut quality.<\/p>\n<p><strong>Does it work with any CNC controller?<\/strong><br \/>Its isolated PNP output connects to the probe or input of most CNC controllers and software such as Mach3. Tell us your system and we will confirm the wiring.<\/p>\n<p><strong>What if my torch has no ohmic shield connection?<\/strong><br \/>Contact us with your torch model; we will advise on wiring or an alternative such as a mechanical float switch.<\/p>\n<p><strong>Do you ship outside Vietnam?<\/strong><br \/>Yes. Contact sales@robot3t.com for a quote including shipping to your country.<\/p>\n<div class=\"r3-cta\">\n<h3>Want accurate pierce height on every cut?<\/h3>\n<p>Tell us your plasma source, torch and CNC controller. Our engineers will recommend the right sensor and height control set, and quote at no cost.<\/p>\n<a href=\"\/en\/contact\/\" class=\"button primary\" style=\"border-radius:99px;\">\n\t\t<span>Request a quote<\/span>\n\t<\/a>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Ohmic sensor for CNC plasma cutting: detects contact between torch shield and plate for accurate initial height sensing. Survives HF and HV sparks up to 660 VDC, 0\u20131 M\u03a9 sensing range, adjustable sensitivity, isolated PNP output, 12\u201324 VDC with reverse-voltage protection. Made in Vietnam by Robot3T.<\/p>\n","protected":false},"featured_media":3061,"comment_status":"closed","ping_status":"closed","template":"","meta":[],"product_brand":[],"product_cat":[114],"product_tag":[119],"class_list":["post-2973","product","type-product","status-publish","has-post-thumbnail","product_cat-mechanized-cutting","product_tag-bo-dieu-khien-do-cao-dau-cat-plasma-en","first","instock","shipping-taxable","purchasable","product-type-simple"],"_links":{"self":[{"href":"https:\/\/robot3t.com\/en\/wp-json\/wp\/v2\/product\/2973","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/robot3t.com\/en\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/robot3t.com\/en\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/robot3t.com\/en\/wp-json\/wp\/v2\/comments?post=2973"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/robot3t.com\/en\/wp-json\/wp\/v2\/media\/3061"}],"wp:attachment":[{"href":"https:\/\/robot3t.com\/en\/wp-json\/wp\/v2\/media?parent=2973"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/robot3t.com\/en\/wp-json\/wp\/v2\/product_brand?post=2973"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/robot3t.com\/en\/wp-json\/wp\/v2\/product_cat?post=2973"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/robot3t.com\/en\/wp-json\/wp\/v2\/product_tag?post=2973"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}