{"id":7506,"date":"2022-05-13T04:53:14","date_gmt":"2022-05-12T20:53:14","guid":{"rendered":"https:\/\/ancor.biz\/?post_type=product&#038;p=7506"},"modified":"2025-08-15T11:43:19","modified_gmt":"2025-08-15T03:43:19","slug":"dwyer-series-at-3000mr-mrs-atex-iecex-approved-photohelic-switch-gage","status":"publish","type":"product","link":"https:\/\/ancor.biz\/index.php\/product\/dwyer-series-at-3000mr-mrs-atex-iecex-approved-photohelic-switch-gage\/","title":{"rendered":"DWYER Series AT-3000MR\/MRS Photohelic Switch\/Gage"},"content":{"rendered":"<h1>Series AT-3000MR\/MRS ATEX\/IECEx Approved Photohelic\u00ae Switch\/Gage,3000MR or 3000MRS Series in Flameproof ATEX\/IECEx Enclosures<\/h1>\n<p>&nbsp;<\/p>\n<p><a href=\"https:\/\/ancor.biz\/index.php\/product-category\/brand\/dwyer-instruments-brand\/\">DWYER<\/a> Series AT-3000MR\/MRS Photohelic Switch\/Gage\u00a0combines the functions of a precise, highly repeatable differential pressure switch with a large easy-to-read analog pressure gage. DWYER Series <a href=\"https:\/\/intl.dwyer-inst.com\/Product\/Pressure\/DifferentialPressure\/Gage-Switches-Dial\/SeriesAT-3000MR-MRS?Query=AT-3000MR\/MRS\">AT-3000MR\/MRS<\/a> Photohelic Switch\/Gage reading is unaffected by switch operation and will indicate accurately even if power is interrupted. AT102-3000MR series employ versatile electromechanical relays with low amperage ratings-ideal for dry circuits.<\/p>\n<p>&nbsp;<\/p>\n<h2>Important notes for installation:<\/h2>\n<ul>\n<li>Cables must be fitted through 1\/2&#8243; NPT cable gland or ATEX\/IECEx conduit (not supplied with instrument).<\/li>\n<li>Make sure after cabling to close tight cover and cable gland, in order to maintain IP66 rating.<\/li>\n<li>Open cover only after de-energizing instrument.<br \/>\n<b><\/b><\/li>\n<li><b>Attention:<\/b> Check local safety rules and warnings on unit and manual for a correct use of the instrument in hazardous areas.<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h2 class=\"sub_heading\">Product Applications<\/h2>\n<ul class=\"list-details inline product_feature\">\n<li>Hazardous area pressure measurement and switching<\/li>\n<li>Pneumatic conveying<\/li>\n<li>Air conditioning systems<\/li>\n<li>Clean rooms<\/li>\n<li>Fume exhaust systems<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<section id=\"specs\" class=\"ui-tabs-panel ui-widget-content ui-corner-bottom\" role=\"tabpanel\" aria-labelledby=\"ui-id-2\" aria-expanded=\"true\" aria-hidden=\"false\">\n<h3>Specifications<\/h3>\n<ul>\n<li>Service: Air and non-combustible, compatible gases.<\/li>\n<li>Wetted Materials: Consult factory.<\/li>\n<li>Housing Material: Aluminum.<\/li>\n<li>Finishing: Texture epoxy coat RAL7015.<\/li>\n<li>Accuracy: \u00b12% of FS at 70\u00b0F (21.1\u00b0C). \u00b13% on -0, -60 Pa and \u00b14% on -00 models.<\/li>\n<li>Pressure Limits: See pressure limit chart on the catalog page.<\/li>\n<li>Temperature Limits: 20 to 120\u00b0F. (-6.67 to 48.9\u00b0C). Option LT low temperature to -20\u00b0F (28.8\u00b0C) (<b>Note:<\/b> Product temperature limits differ from case).<\/li>\n<li>Power Requirements: 24 VDC, regulated \u00b110%.<\/li>\n<li>Electrical Wiring: Screw terminals.<\/li>\n<li>Mounting Orientation: Diaphragm in vertical position.<\/li>\n<li>Enclosure Rating: IP66.<\/li>\n<li>Process Connections: 1\/8&#8243; NPT female brass (SS optional).<\/li>\n<li>Electrical Connections: Two 1\/2&#8243; NPT female. Cable gland not included.<\/li>\n<li>Dial Size: 4&#8243; (101.6 mm).<\/li>\n<li>Set Point Adjustment: Adjustable knobs on face behind enclosure cover. Follow instructions and safety warnings to open cover.<\/li>\n<li>Weight: 13.2 lb (6 kg).<\/li>\n<li>ATEX Certificate: INERIS 21ATEX0033X.<\/li>\n<li>IECEx Certificate: IECEx INE 21.0064X.<\/li>\n<li>Agency Approvals: ATEX Compliant: <img decoding=\"async\" src=\"https:\/\/www.dwyer-inst.com\/images\/addtl\/CE_17x12.png\" alt=\"CE\" \/> 0080 <img decoding=\"async\" src=\"https:\/\/www.dwyer-inst.com\/images\/addtl\/ATEX_13x12.png\" alt=\"EX\" \/> II 2G Ex db IIC T5, T6 Gb -60\u00b0C \u2264Ta \u2264+50\u00b0C (T6) -60\u00b0C \u2264Ta \u2264+60\u00b0C (T5) II 2D Ex tb IIIC T75 \u00b0C Db;<br \/>\nIECEx Compliant: Ex db IIC T5, T6 Gb -60\u00b0C \u2264Ta \u2264+50\u00b0C (T6) -60\u00b0C \u2264Ta \u2264+60\u00b0C (T5) Ex tb IIIC T75\u00b0C Db.<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h2>SWITCH SPECIFICATIONS (3000MR)<\/h2>\n<ul>\n<li>Switch Type: Each set point has 1 Form C relay (SPDT).<\/li>\n<li>Relay Contacts: (resistive load) 1 Form C rated 1.0 A @ 30 VDC, 0.3 A @ 110 VDC or 0.5 A @ 125 VAC. Gold over clad silver &#8211; suitable for dry circuits.<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h2>SWITCH SPECIFICATIONS (3000MRS)<\/h2>\n<ul>\n<li>Switch Type: Each set point has a solid state relay.<\/li>\n<li>Switching Voltage: 20 to 280 VAC (47 to 63 Hz).<\/li>\n<li>Switching Current: 1.0 amp (AC) max., 0.01 mA (AC) min., (2) SPST NO.<\/li>\n<\/ul>\n<\/section>\n<p>&nbsp;<\/p>\n<section id=\"features\" class=\"ui-tabs-panel ui-widget-content ui-corner-bottom\" role=\"tabpanel\" aria-labelledby=\"ui-id-3\" aria-expanded=\"true\" aria-hidden=\"false\">\n<h2 class=\"tab-heading\">Features<\/h2>\n<ul>\n<li>Gage reading unaffected by switch operation and will continue to read pressure even during power loss<\/li>\n<li>Zero and range adjustments outside of gage means no disassembly in normal service<\/li>\n<li>Solid-state design allows for switching in high cycle rate applications without degradation<\/li>\n<li>Flameproof enclosure with optional glass window and aluminum housing protects the device in hazardous areas while giving local visibility to process pressure and set point status<\/li>\n<li>Increased response time at low pressures with LD port configuration<\/li>\n<\/ul>\n<\/section>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Series AT-3000MR\/MRS ATEX\/IECEx Approved Photohelic\u00ae Switch\/Gage,3000MR or 3000MRS Series in Flameproof ATEX\/IECEx Enclosures &nbsp; DWYER Series AT-3000MR\/MRS Photohelic Switch\/Gage\u00a0combines the functions of a precise, highly repeatable differential pressure switch with a large easy-to-read analog pressure gage. DWYER Series AT-3000MR\/MRS Photohelic Switch\/Gage reading is unaffected by switch operation and will indicate accurately even if power is &#8230; <a title=\"DWYER Series AT-3000MR\/MRS Photohelic Switch\/Gage\" class=\"read-more\" href=\"https:\/\/ancor.biz\/index.php\/product\/dwyer-series-at-3000mr-mrs-atex-iecex-approved-photohelic-switch-gage\/\" aria-label=\"More on DWYER Series AT-3000MR\/MRS Photohelic Switch\/Gage\">Read more<\/a><\/p>\n","protected":false},"featured_media":7508,"template":"","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"spay_email":""},"class_list":["post-7506","product","type-product","status-publish","has-post-thumbnail","hentry","product_cat-brand","product_cat-differential-pressure-gauge","product_cat-pressure-gauge-dwyer-instruments-brand","product_cat-dwyer-instruments-brand","product_cat-dwyer-instruments-dwyer-omega","product_cat-dwyer-omega","product_cat-gage-switches-dial","product_cat-pressure-gauge","product_cat-pressure-gauge-differential","product_cat-dwyer-instruments-pressure-gauge-differential","product_tag-at-3000mr","product_tag-dwyer-series-at-3000mr-mrs","product_tag-dwyer-series-at-3000mr-mrs-photohelic-switch-gage","sales-flash-overlay","woocommerce-text-align-center","woocommerce-image-align-center","do-quantity-buttons"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v23.3 - 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