{"id":7805,"date":"2022-05-19T08:36:04","date_gmt":"2022-05-19T00:36:04","guid":{"rendered":"https:\/\/ancor.biz\/?post_type=product&#038;p=7805"},"modified":"2025-08-18T12:05:50","modified_gmt":"2025-08-18T04:05:50","slug":"dwyer-series-at-1800-atex-iecex-approved-low-differential-pressure-switch","status":"publish","type":"product","link":"https:\/\/ancor.biz\/index.php\/product\/dwyer-series-at-1800-atex-iecex-approved-low-differential-pressure-switch\/","title":{"rendered":"DWYER Series AT-1800 Differential Pressure Switch"},"content":{"rendered":"<h1>Series AT-1800 ATEX\/IECEx Approved Low Differential Pressure Switch, The 1800 in Flameproof ATEX\/IECEx Enclosure<\/h1>\n<p>&nbsp;<\/p>\n<p>Essential for industrial environments, the\u00a0<a href=\"https:\/\/ancor.biz\/index.php\/product-category\/brand\/dwyer-instruments-brand\/\">DWYER<\/a> Series AT-1800 Differential Pressure Switch combines small size with 2% repeatability. Set point adjustment inside the switch allows for set point settings across 9 ranges from the low of .07 in w.c. to a maximum 85 in w.c. differential pressure. DWYER Series AT-1800 Differential Pressure Switch flameproof enclosures are available in aluminum and are ideal for low pressure hazardous area applications. Various housing options such as an over-pressure relief valve or external set point adjustment knob are available. External set point knob allows adjustment without opening the enclosure.<\/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<\/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 switch<\/li>\n<li>Process applications<\/li>\n<li>Mechanical equipment control<\/li>\n<\/ul>\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>Compact size and repeatability provides a high-value switch for many industrial applications<\/li>\n<li>External set point knob provides easy access that simplifies making adjustments without opening enclosure<\/li>\n<li>Flameproof enclosure protects the device in hazardous areas<\/li>\n<li>Increased response time at low pressures with LD port configuration<\/li>\n<\/ul>\n<\/section>\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 class=\"list-specs lined\">\n<li>Service: Air and non-combustible, compatible gases.<\/li>\n<li>Wetted Materials: Consult factory.<\/li>\n<li class=\"title\">Temperature Limits: -30 to 180\u00b0F (-34 to 82.2\u00b0C); 1823-00, -20 to 180\u00b0F (-28.9 to 82.2\u00b0C) (<b>Note:<\/b> Product temperature limits differ from case).<\/li>\n<li class=\"title\">Pressure Limits: See pressure limit chart on the catalog page.<\/li>\n<li class=\"title\">Switch Type: SPDT.<\/li>\n<li class=\"title\">Repeatability: \u00b12% FS.<\/li>\n<li class=\"title\">Electrical Rating: 15 A @ 120-480 VAC, 60 Hz. Resistive 1\/8 HP @ 125 VAC, 1\/4 HP @ 250 VAC, 60 Hz. De-rate to 10 A for operation at high cycle rates.<\/li>\n<li class=\"title\">Mounting Orientation: Diaphragm in vertical position.<\/li>\n<li class=\"title\">Set Point Adjustment: Screw type inside mounting spud internal to switch. External set point adjustment knob optional.<\/li>\n<li class=\"title\">Enclosure Rating: IP66.<\/li>\n<li class=\"title\">Housing Material: Aluminum.<\/li>\n<li class=\"title\">Finishing: Texture epoxy coat RAL7015.<\/li>\n<li class=\"title\">Process Connections: 1\/8&#8243; NPT female brass (SS optional).<\/li>\n<li class=\"title\">Electrical Connections: Two 1\/2&#8243; NPT female. Cable gland not included.<\/li>\n<li class=\"title\">Weight: 10.5 lb (4.8 kg).<\/li>\n<li class=\"title\">ATEX Certificate: INERIS 21ATEX0033X.<\/li>\n<li class=\"title\">IECEx Certificate: IECEx INE 21.0064X.<\/li>\n<li class=\"description\">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;<\/li>\n<li class=\"description\">IECEx 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<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Series AT-1800 ATEX\/IECEx Approved Low Differential Pressure Switch, The 1800 in Flameproof ATEX\/IECEx Enclosure &nbsp; Essential for industrial environments, the\u00a0DWYER Series AT-1800 Differential Pressure Switch combines small size with 2% repeatability. Set point adjustment inside the switch allows for set point settings across 9 ranges from the low of .07 in w.c. to a maximum &#8230; <a title=\"DWYER Series AT-1800 Differential Pressure Switch\" class=\"read-more\" href=\"https:\/\/ancor.biz\/index.php\/product\/dwyer-series-at-1800-atex-iecex-approved-low-differential-pressure-switch\/\" aria-label=\"More on DWYER Series AT-1800 Differential Pressure Switch\">Read more<\/a><\/p>\n","protected":false},"featured_media":7806,"template":"","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"spay_email":""},"class_list":["post-7805","product","type-product","status-publish","has-post-thumbnail","hentry","product_cat-brand","product_cat-diffrential-pressure","product_cat-dwyer-switch-vacuum","product_cat-dwyer-instruments-brand","product_cat-dwyer-instruments-dwyer-omega","product_cat-dwyer-omega","product_cat-pressure-switch-dwyer-instruments-dwyer-omega","product_cat-switch-vacuum","product_cat-pressure-switch","product_cat-switch","product_tag-dwyer-series-at-1800-differential-pressure-switch","product_tag-series-at-1800","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 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>DWYER Series AT-1800 Differential Pressure Switch - Ancor Sdn Bhd<\/title>\n<meta name=\"description\" content=\"DWYER Series AT-1800 Differential Pressure Switch. Series AT-1800 ATEX\/IECEx Approved Low Differential Pressure Switch, The 1800 in Flameproof ATEX\/IECEx Enclosure\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/ancor.biz\/index.php\/product\/dwyer-series-at-1800-atex-iecex-approved-low-differential-pressure-switch\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"DWYER Series AT-1800 Differential Pressure Switch - Ancor Sdn Bhd\" \/>\n<meta property=\"og:description\" content=\"DWYER Series AT-1800 Differential Pressure Switch. 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