{"product_id":"harwil-q-15-flow-switch","title":"Harwil Q-15 Hall Effect Flow Switch, 0.7 to 590 GPM, 3\/4 in NPT, 250 psi","description":"\n\u003cstyle\u003e\n  .hq15-wrap, .hq15-wrap * { box-sizing: border-box; }\n  .hq15-wrap {\n    font-family: -apple-system, BlinkMacSystemFont, \"Segoe UI\", Roboto, Helvetica, Arial, sans-serif;\n    color: #1a1a1a;\n    line-height: 1.55;\n  }\n\n  \/* Header *\/\n  .hq15-header {\n    border-left: 5px solid #2db896;\n    padding: 4px 0 4px 16px;\n    margin-bottom: 20px;\n  }\n  .hq15-header h2 {\n    margin: 0;\n    color: #0d4f4a;\n    font-size: 1.55em;\n    font-weight: 700;\n    letter-spacing: -0.01em;\n  }\n  .hq15-subtitle {\n    margin: 4px 0 0;\n    color: #666;\n    font-size: 0.95em;\n  }\n\n  \/* Intro *\/\n  .hq15-intro {\n    margin: 0 0 24px;\n    color: #333;\n    font-size: 0.98em;\n  }\n\n  \/* Section heading *\/\n  .hq15-section { margin-bottom: 28px; }\n  .hq15-section-heading {\n    background: #0d4f4a;\n    color: #fff;\n    font-size: 0.85em;\n    font-weight: 700;\n    letter-spacing: 0.08em;\n    text-transform: uppercase;\n    padding: 6px 12px;\n    margin: 0 0 0;\n    border-radius: 4px 4px 0 0;\n  }\n\n  \/* Spec table *\/\n  .hq15-spec-table {\n    width: 100%;\n    border-collapse: collapse;\n    font-size: 0.93em;\n    background: #fff;\n    border: 1px solid #d8dde6;\n    border-top: none;\n    border-radius: 0 0 4px 4px;\n    overflow: hidden;\n  }\n  .hq15-spec-table tr { border-bottom: 1px solid #eef1f6; }\n  .hq15-spec-table tr:nth-child(even) { background: #fafbfd; }\n  .hq15-spec-table tr:last-child { border-bottom: none; }\n  .hq15-spec-table th,\n  .hq15-spec-table td {\n    text-align: left;\n    padding: 8px 14px;\n    vertical-align: top;\n  }\n  .hq15-spec-table th {\n    font-weight: 600;\n    color: #4a4a4a;\n    width: 38%;\n  }\n  .hq15-spec-table td {\n    color: #1a1a1a;\n    font-family: ui-monospace, \"SF Mono\", Menlo, Consolas, monospace;\n    font-size: 0.92em;\n  }\n\n  \/* Compatibility list *\/\n  .hq15-compat-list {\n    margin: 0;\n    padding: 14px 16px 14px 32px;\n    background: #fff;\n    border: 1px solid #d8dde6;\n    border-top: none;\n    border-radius: 0 0 4px 4px;\n    list-style: square;\n    color: #1a1a1a;\n    font-size: 0.95em;\n  }\n  .hq15-compat-list li { padding: 2px 0; }\n  .hq15-compat-list li::marker { color: #2db896; }\n\n  \/* Cross-reference chip list *\/\n  .hq15-chips {\n    padding: 14px;\n    background: #fff;\n    border: 1px solid #d8dde6;\n    border-top: none;\n    border-radius: 0 0 4px 4px;\n    display: flex;\n    flex-wrap: wrap;\n    gap: 8px;\n  }\n  .hq15-chip {\n    background: #f0f3f8;\n    border: 1px solid #d8dde6;\n    color: #0d4f4a;\n    padding: 5px 12px;\n    border-radius: 4px;\n    font-family: ui-monospace, \"SF Mono\", Menlo, Consolas, monospace;\n    font-size: 0.88em;\n    font-weight: 600;\n  }\n\n  \/* Notes \/ FAQ *\/\n  .hq15-notes {\n    padding: 14px;\n    background: #fff;\n    border: 1px solid #d8dde6;\n    border-top: none;\n    border-radius: 0 0 4px 4px;\n  }\n  .hq15-note-item { padding: 8px 0; border-bottom: 1px solid #eef1f6; }\n  .hq15-note-item:last-child { border-bottom: none; }\n  .hq15-note-q { font-weight: 600; color: #0d4f4a; margin: 0 0 3px; font-size: 0.95em; }\n  .hq15-note-a { margin: 0; color: #333; font-size: 0.93em; }\n\n  \/* Footer *\/\n  .hq15-footer {\n    border-top: 1px solid #d8dde6;\n    padding-top: 12px;\n    margin-top: 24px;\n    text-align: center;\n    color: #555;\n    font-size: 0.88em;\n  }\n  .hq15-footer .hq15-dot {\n    color: #2db896;\n    margin: 0 8px;\n    font-weight: 700;\n  }\n\u003c\/style\u003e\n\n\u003cdiv class=\"hq15-wrap\"\u003e\n\n  \u003cheader class=\"hq15-header\"\u003e\n    \u003ch2\u003eHarwil Q-15 Hall Effect Flow Switch\u003c\/h2\u003e\n    \u003cp class=\"hq15-subtitle\"\u003eThe most sensitive paddle switch.\u003c\/p\u003e\n  \u003c\/header\u003e\n\n  \u003cp class=\"hq15-intro\"\u003eThe \u003cstrong\u003eHarwil Q-15\u003c\/strong\u003e is the most sensitive paddle type flow switch Harwil builds. It uses \u003cstrong\u003eHall Effect\u003c\/strong\u003e technology programmed for the highest sensitivity, and ships standard with 8 conductor modular cable and a Cat 3 modular connector.\u003c\/p\u003e\n\n  \n    \n    \u003csection class=\"hq15-section\"\u003e\n      \u003cdiv class=\"hq15-section-heading\"\u003eFlow and Pressure\u003c\/div\u003e\n      \u003ctable class=\"hq15-spec-table\"\u003e\n        \u003ctbody\u003e\n          \u003ctr\u003e\n\u003cth\u003eFlow Range\u003c\/th\u003e\n\u003ctd\u003e0.7 to 590 GPM (2.6 to 2,233 L\/m)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWorking Temperature\u003c\/th\u003e\n\u003ctd\u003e180 F (82 C) maximum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWorking Pressure\u003c\/th\u003e\n\u003ctd\u003e250 psi\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePressure Drop\u003c\/th\u003e\n\u003ctd\u003eTypically less than 1.0 psig at normal flow\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMax Flow\u003c\/th\u003e\n\u003ctd\u003eMay be five times normal flow\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003c\/tbody\u003e\n      \u003c\/table\u003e\n    \u003c\/section\u003e\n    \n    \u003csection class=\"hq15-section\"\u003e\n      \u003cdiv class=\"hq15-section-heading\"\u003eConnection and Body\u003c\/div\u003e\n      \u003ctable class=\"hq15-spec-table\"\u003e\n        \u003ctbody\u003e\n          \u003ctr\u003e\n\u003cth\u003eProcess Connection\u003c\/th\u003e\n\u003ctd\u003e3\/4 inch NPT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBody Material\u003c\/th\u003e\n\u003ctd\u003eBrass (Q-15B) or Stainless (Q-15S)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCoupling\u003c\/th\u003e\n\u003ctd\u003eMagnetic\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003c\/tbody\u003e\n      \u003c\/table\u003e\n    \u003c\/section\u003e\n    \n    \u003csection class=\"hq15-section\"\u003e\n      \u003cdiv class=\"hq15-section-heading\"\u003eElectrical\u003c\/div\u003e\n      \u003ctable class=\"hq15-spec-table\"\u003e\n        \u003ctbody\u003e\n          \u003ctr\u003e\n\u003cth\u003eSensing\u003c\/th\u003e\n\u003ctd\u003eHall Effect\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eElectrical Contacts\u003c\/th\u003e\n\u003ctd\u003eSPNO .25A (250 mA)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCable\u003c\/th\u003e\n\u003ctd\u003e8 conductor modular cable, Cat 3 modular connector standard\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003c\/tbody\u003e\n      \u003c\/table\u003e\n    \u003c\/section\u003e\n    \n  \n\n  \n  \u003csection class=\"hq15-section\"\u003e\n    \u003cdiv class=\"hq15-section-heading\"\u003eCompatibility\u003c\/div\u003e\n    \u003cul class=\"hq15-compat-list\"\u003e\n      \u003cli\u003eBrakes and clutches\u003c\/li\u003e\n\u003cli\u003eEmergency wash-down showers\u003c\/li\u003e\n\u003cli\u003eFire sprinkler flow alarms\u003c\/li\u003e\n\u003cli\u003eLasers and vacuum systems\u003c\/li\u003e\n\u003cli\u003eIrrigation, salt and fresh water systems\u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/section\u003e\n  \n\n  \n  \u003csection class=\"hq15-section\"\u003e\n    \u003cdiv class=\"hq15-section-heading\"\u003eCross-References\u003c\/div\u003e\n    \u003cdiv class=\"hq15-chips\"\u003e\n      \u003cspan class=\"hq15-chip\"\u003eQ-15B\u003c\/span\u003e\u003cspan class=\"hq15-chip\"\u003eQ-15S\u003c\/span\u003e\n    \u003c\/div\u003e\n  \u003c\/section\u003e\n  \n\n  \n  \u003csection class=\"hq15-section\"\u003e\n    \u003cdiv class=\"hq15-section-heading\"\u003eNotes\u003c\/div\u003e\n    \u003cdiv class=\"hq15-notes\"\u003e\n      \n      \u003cdiv class=\"hq15-note-item\"\u003e\n        \u003cp class=\"hq15-note-q\"\u003eBrass or stainless?\u003c\/p\u003e\n        \u003cp class=\"hq15-note-a\"\u003e\u003cstrong\u003eQ-15B\u003c\/strong\u003e is brass. \u003cstrong\u003eQ-15S\u003c\/strong\u003e is stainless. Both use the same 3\/4 inch NPT process connection.\u003c\/p\u003e\n      \u003c\/div\u003e\n      \n      \u003cdiv class=\"hq15-note-item\"\u003e\n        \u003cp class=\"hq15-note-q\"\u003eWhat makes the Q-15 more sensitive?\u003c\/p\u003e\n        \u003cp class=\"hq15-note-a\"\u003eIt uses Hall Effect sensing with magnetic coupling rather than a mechanical contact, and it is programmed for the highest sensitivity in the Harwil paddle line.\u003c\/p\u003e\n      \u003c\/div\u003e\n      \n    \u003c\/div\u003e\n  \u003c\/section\u003e\n  \n\n  \u003cfooter class=\"hq15-footer\"\u003e\n    Genuine Harwil\u003cspan class=\"hq15-dot\"\u003e•\u003c\/span\u003eFactory Specifications\u003cspan class=\"hq15-dot\"\u003e•\u003c\/span\u003eFast Shipping\u003cspan class=\"hq15-dot\"\u003e•\u003c\/span\u003eExpert Support\n  \u003c\/footer\u003e\n\n\u003c\/div\u003e\n","brand":"Harwil Corporation","offers":[{"title":"Stainless \/ #3SM - 3\/4\" \/ 3 ON \/ 2 OFF","offer_id":55882673422658,"sku":"PFS-Q-15S\/3SM","price":234.0,"currency_code":"USD","in_stock":true},{"title":"Stainless \/ #3(.7SM)* - 3\/4\" \/ 0.9 ON \/ 0.8 OFF","offer_id":55882673455426,"sku":"PFS-Q-15S\/3(.7SM)","price":234.0,"currency_code":"USD","in_stock":true},{"title":"Brass \/ #3SM - 3\/4\" \/ 3 ON \/ 2 OFF","offer_id":55882673488194,"sku":"PFS-Q-15B\/3SM","price":186.0,"currency_code":"USD","in_stock":true},{"title":"Brass \/ #3(.7SM)* - 3\/4\" \/ 0.9 ON \/ 0.8 OFF","offer_id":55882673520962,"sku":"PFS-Q-15B\/3(.7SM)","price":155.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1022\/1040\/4674\/files\/Q-15-2_208f245f-267b-42d9-a52f-210153b00414.jpg?v=1786333705","url":"https:\/\/pureflowsystems.com\/products\/harwil-q-15-flow-switch","provider":"Pure Flow Systems","version":"1.0","type":"link"}