{"title":"Flow - Variable area (QH)","description":null,"products":[{"product_id":"qhka-schwebekorper-durchflussmesser-metallmessrohr","title":"QHKA metal tube variable area flowmeter","description":"\u003cp\u003eThe \u003cstrong\u003eQHKA\u003c\/strong\u003e is a metal tube variable area flowmeter for liquids and gases. It is particularly suited to water, air and oil at low to high medium temperatures and, in its simplest version, works without any auxiliary power.\u003c\/p\u003e\u003cp\u003eVariable area principle, the float in a conical metal tube transmits its height magnetically to the pointer. Measuring range water \u003cstrong\u003e1 … 200 000 L\/h\u003c\/strong\u003e, air \u003cstrong\u003e0.03 … 4000 m³\/h\u003c\/strong\u003e (at 20 °C and 0.1013 MPa), turndown 10:1, accuracy \u003cstrong\u003e1.5 % F.S.\u003c\/strong\u003e Output \u003cstrong\u003e4 … 20 mA\u003c\/strong\u003e or 0 … 10 mA, alarm contact as normally open contact or relay. Supply 24 V DC two-wire (10.8 … 36 V DC), 85 … 265 V AC or NiMH battery 3.6 V \/ 4 Ah. Indicator M1 mechanical pointer without power, M2 pointer with \u003cstrong\u003eLCD\u003c\/strong\u003e for instantaneous and totalized flow, M3 LCD only.\u003c\/p\u003e\u003cp\u003eMeasuring system of 316Ti, 321, 316L, PTFE or titanium alloy. Process connection flange to GB\/T 9119-2000 or sanitary clamp; nominal pressure DN15 … DN50 4.0 MPa, DN80 … DN150 1.6 MPa, clamp 1.6 MPa. Medium temperature -80 … +200 °C, 0 … +85 °C with PTFE, up to +400 °C in the high-temperature version; ambient -30 … +85 °C; protection \u003cstrong\u003eIP65\u003c\/strong\u003e. Explosion protection per the sheet Ex ia IIC T6 and Ex d IIC T6, without certificate number and notified body. A declaration of conformity is not documented in the datasheet. Before sizing, note: each pressure value is followed by a second figure in brackets (25 MPa, 16 MPa) without explanation. A dimensioned drawing is missing; the only dimension is the overall height of 250 mm.\u003c\/p\u003e\u003ch3\u003eAdvantages at a glance\u003c\/h3\u003e\u003cul\u003e\u003cli\u003ePointer version without auxiliary power\u003c\/li\u003e\u003cli\u003eLCD for instantaneous and totalized flow\u003c\/li\u003e\u003cli\u003e4 … 20 mA, 0 … 10 mA and alarm contact\u003c\/li\u003e\u003cli\u003eMedium temperature up to +400 °C in the high-temperature version\u003c\/li\u003e\u003cli\u003eMeasuring system also of PTFE or titanium alloy\u003c\/li\u003e\u003cli\u003eVertical, horizontal and other mounting positions\u003c\/li\u003e\u003cli\u003eParameters changeable on site\u003c\/li\u003e\u003cli\u003eHeating jacket available\u003c\/li\u003e\u003cli\u003eProtection IP65\u003c\/li\u003e\u003c\/ul\u003e","brand":"octogon GmbH","offers":[{"title":"Default Title","offer_id":57453657129286,"sku":null,"price":0.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/5558\/6374\/files\/QHKA_produkt.webp?v=1790331873"},{"product_id":"qhkb-schwebekorper-durchflussmesser-glasmessrohr","title":"QHKB glass tube variable area flowmeter","description":"\u003cp\u003eThe \u003cstrong\u003eQHKB\u003c\/strong\u003e is a glass tube variable area flowmeter whose flow is read directly off the scale. It is particularly suited to water, juice, milk, pure water and other clean liquids as well as gases where a local reading is sufficient.\u003c\/p\u003e\u003cp\u003eVariable area principle, the float rides in a conical glass tube against a scale. Measuring range liquid \u003cstrong\u003e2.5 L\/h … 25 m³\/h\u003c\/strong\u003e in seventeen steps, gas \u003cstrong\u003e40 L\/h … 480 m³\/h\u003c\/strong\u003e in fifteen steps. Accuracy, turndown and repeatability are not documented in the datasheet. The device is purely mechanical: \u003cstrong\u003eno supply, no output\u003c\/strong\u003e, no switching contact. Process connection clamp, thread or flange, \u003cstrong\u003eG1\/4, G3\/4, G1 or G1-1\/2\u003c\/strong\u003e by size.\u003c\/p\u003e\u003cp\u003eBody of stainless steel \u003cstrong\u003e304 or 316\u003c\/strong\u003e, nominal sizes DN10, DN20, DN25 and DN40, weight 0.25 kg to 5.0 kg by size. Vertical mounting with flow from bottom to top. Working pressure, medium temperature, protection grade, float and seal materials and the type of glass are not documented. A declaration of conformity is not documented in the datasheet. Before sizing, note: working pressure and medium temperature are missing and must be clarified with the enquiry. For milk and juice, seal material and cleaning (CIP\/SIP) are not documented. The units of the range table change within the columns between L\/h, L\/min and m³\/h.\u003c\/p\u003e\u003ch3\u003eAdvantages at a glance\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eDirect reading on the glass tube\u003c\/li\u003e\u003cli\u003eNo auxiliary power required\u003c\/li\u003e\u003cli\u003eBody of stainless steel 304 or 316\u003c\/li\u003e\u003cli\u003eClamp, thread or flange connection\u003c\/li\u003e\u003cli\u003eSeventeen liquid and fifteen gas ranges\u003c\/li\u003e\u003cli\u003eNominal sizes DN10 to DN40\u003c\/li\u003e\u003cli\u003eOffered for water, juice, milk and pure water\u003c\/li\u003e\u003c\/ul\u003e","brand":"octogon GmbH","offers":[{"title":"Default Title","offer_id":57453657293126,"sku":null,"price":0.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/5558\/6374\/files\/QHKB_produkt.webp?v=1790331873"}],"url":"https:\/\/octogon-sensors.com\/en\/collections\/flow-variable-area-qh.oembed","provider":"octogon GmbH","version":"1.0","type":"link"}