{"id":7511,"date":"2022-05-13T06:09:50","date_gmt":"2022-05-12T22:09:50","guid":{"rendered":"https:\/\/ancor.biz\/?post_type=product&#038;p=7511"},"modified":"2025-08-15T11:43:19","modified_gmt":"2025-08-15T03:43:19","slug":"dwyer-series-at-a3000-atex-iecex-approved-photohelic-pressure-switch-gage","status":"publish","type":"product","link":"https:\/\/ancor.biz\/index.php\/product\/dwyer-series-at-a3000-atex-iecex-approved-photohelic-pressure-switch-gage\/","title":{"rendered":"DWYER Series AT-A3000 Photohelic Pressure Switch\/Gage"},"content":{"rendered":"<h1>Series AT-A3000 ATEX\/IECEx Approved Photohelic\u00ae Pressure Switch\/Gage,Photohelic\u00ae Switch\/Gages in Flameproof ATEX\/IECEx Enclosures<\/h1>\n<p>&nbsp;<\/p>\n<p>Flameproof approved\u00a0<a href=\"https:\/\/ancor.biz\/index.php\/product-category\/brand\/dwyer-instruments-brand\/\">DWYER<\/a> Series AT-A3000 Photohelic Pressure Switch\/Gage functions as versatile, highly repeatable pressure switch combined with a precise pressure gage employing the time-proven Magnehelic\u00ae gage design. The DWYER Series <a href=\"https:\/\/intl.dwyer-inst.com\/Product\/Pressure\/DifferentialPressure\/Gage-Switches-Dial\/SeriesAT-A3000?Query=AT-A3000\">AT-A3000<\/a> Photohelic Pressure Switch\/Gage measures and controls positive, negative or differential pressures of air and compatible gases. Two photo-transistor actuated, DPDT relays are included for low\/high limit control. Easy-to-adjust set point indicators are controlled by knobs located on the gage face (accessible opening case after de-energizing instrument). Set points can be interlocked to provide variable dead band which is ideal for control of fans, dampers, etc. Gage reading is continuous and unaffected by switch operation, even during loss of electrical power. Flameproof enclosures are available in aluminum with a glass window which allows for viewing of set point needles and process pressure.<\/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 transmitter<\/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<h1 class=\"tab-heading\">Specifications<\/h1>\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 and \u00b14% on -00 models.<\/li>\n<li>Pressure Limits: See pressure limit chart on catalog page.<\/li>\n<li>Temperature Limits: 20 to 120\u00b0F (-6.67 to 48.9\u00b0C) LT low temperature option to -20\u00b0F available (<b>Note:<\/b> Product temperature limits differ from case).<\/li>\n<li>Dial Size: 4&#8243; (101.6 mm).<\/li>\n<li>Mounting Orientation: Diaphragm in vertical position.<\/li>\n<li>Set Point Adjustment: Adjustable knobs on Photohelic\u00ae gage face behind enclosure cover. Follow instructions and safety warnings to open cover.<\/li>\n<\/ul>\n<\/section>\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<ul class=\"list-specs lined\">\n<li class=\"description\"><b>SWITCH SPECIFICATIONS<\/b><\/li>\n<\/ul>\n<ul>\n<li>Switch Type: Each set point has 2 form C relays (DPDT).<\/li>\n<li>Repeatability:\u00b11% of FS.<\/li>\n<li>Electrical Rating: 10 A @ 28 VDC, 10 A @ 120, 240 VAC.<\/li>\n<li>Electrical Wiring: Screw terminals.<\/li>\n<li>Power Requirements: 120 VAC, 50\/60 Hz; 240 VAC and 24 VAC power optional.<\/li>\n<li>Enclosure Rating: IP66 (IP65 for versions VS1, VS2, VL1).<\/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>Weight: 19.8 lb (9 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<\/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<h1 class=\"tab-heading\">Features<\/h1>\n<ul>\n<li>Saves inventory, installation time, and money by consolidating several instruments into one ATEX\/IECEx approved product<\/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-A3000 ATEX\/IECEx Approved Photohelic\u00ae Pressure Switch\/Gage,Photohelic\u00ae Switch\/Gages in Flameproof ATEX\/IECEx Enclosures &nbsp; Flameproof approved\u00a0DWYER Series AT-A3000 Photohelic Pressure Switch\/Gage functions as versatile, highly repeatable pressure switch combined with a precise pressure gage employing the time-proven Magnehelic\u00ae gage design. The DWYER Series AT-A3000 Photohelic Pressure Switch\/Gage measures and controls positive, negative or differential pressures of &#8230; <a title=\"DWYER Series AT-A3000 Photohelic Pressure Switch\/Gage\" class=\"read-more\" href=\"https:\/\/ancor.biz\/index.php\/product\/dwyer-series-at-a3000-atex-iecex-approved-photohelic-pressure-switch-gage\/\" aria-label=\"More on DWYER Series AT-A3000 Photohelic Pressure Switch\/Gage\">Read more<\/a><\/p>\n","protected":false},"featured_media":7512,"template":"","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"spay_email":""},"class_list":["post-7511","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-dwyer-series-at-a3000","product_tag-dwyer-series-at-a3000-photohelic-pressure-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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