{"product_id":"square-d-9013fhg-air-compressor-pressure-switch-1","title":"SQUARE D 9013fhg Air Compressor Pressure Switch","description":"\u003cdiv\u003e\u003cp\u003eThe Square D Telemecanique 9013FHG air compressor pressure switch is a Pumptrol-style control that automatically starts and stops a compressor motor based on tank pressure. Designed for 100–200 psi systems, the 9013FHG family commonly uses a fixed differential with ON at 135 psi and OFF at 175 psi, providing a 40 psi gap that helps prevent short cycling. Many versions include a built‑in unloader valve to vent the compressor head when the switch opens, aiding smoother restarts, and feature a 1\/4-inch threaded pressure port for compatibility with standard fittings. The device uses a two-pole, double-throw (DPST) contact arrangement to switch the motor circuit, a common configuration for small to mid‑size air compressors and two‑stage units. Applications span portable and stationary compressors used in automotive shops, manufacturing, and general workshop environments where reliable automatic pressure control is essential. When selecting a specific 9013FHG variant, verify the exact port thread type and whether an unloader valve is included, as these features vary by part number (for example, 9013FHG variants with 135\/175 psi setpoints and 1\/4\" threads are commonly offered).\u003c\/p\u003e\u003c\/div\u003e","brand":"SQUARE D","offers":[{"title":"New","offer_id":51713463746862,"sku":null,"price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/0818\/1038\/files\/Ebay_website_image_67f72d7e-f285-4e7e-8800-b5a616d38a6e.jpg?v=1770400528","url":"https:\/\/plgautomation.com\/products\/square-d-9013fhg-air-compressor-pressure-switch-1","provider":"PLG Automation ","version":"1.0","type":"link"}