{"product_id":"qzkh-ovalrad-durchflussmesser-mit-mechanischem-zahlwerk","title":"QZKH oval gear flowmeter with mechanical counter","description":"\u003cp\u003eThe \u003cstrong\u003eQZKH\u003c\/strong\u003e is an oval gear flowmeter with a mechanical counter and flanged connection for nominal sizes from DN10 to DN200. It is particularly suited to measuring points without auxiliary power, since it counts without a supply; an electrical output is available as an accessory.\u003c\/p\u003e\u003cp\u003ePositive displacement, two oval gears drive the counter through a gear train, no straight inlet run needed. Flow range from 0.03 at DN10 to 340 at DN200, given without a unit in the sheet. Accuracy class \u003cstrong\u003e0.5 or 0.2\u003c\/strong\u003e, depending on viscosity; repeatability is not documented. Reading on the \u003cstrong\u003emechanical counter\u003c\/strong\u003e or an electronic counter. Optional photoelectric \u003cstrong\u003epulse transmitter\u003c\/strong\u003e, three-wire, 12 or 24 V, or a \u003cstrong\u003e4 … 20 mA\u003c\/strong\u003e transmitter without stated supply, load or accuracy.\u003c\/p\u003e\u003cp\u003eFive material versions: cast iron, cast steel, cast iron with aluminium-alloy gears, stainless steel throughout, and aluminium alloy as lightweight version; nominal pressure 1.6 · 2.5 · 4.0 · 6.3 MPa by model. Working temperature -10 … +60 °C, ambient -40 … +50 °C. The protection grade is not documented. Explosion protection per the sheet 'Ex d IIB T4', without certificate, group or category. A declaration of conformity is not documented in the datasheet. Before sizing, note: the flow tables carry no unit; only the questionnaire speaks of m³\/h. A medium temperature is stated nowhere and the statements on the high-temperature version contradict each other. The nominal pressure depends on model and size and departs from the steps with 4.1 MPa for cast steel at DN80 … DN100.\u003c\/p\u003e\u003ch3\u003eAdvantages at a glance\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eMechanical counter, works without power\u003c\/li\u003e\u003cli\u003eFlanged connection DN10 … DN200\u003c\/li\u003e\u003cli\u003eAccuracy class 0.5 or 0.2\u003c\/li\u003e\u003cli\u003eFive material versions from cast iron to stainless steel\u003c\/li\u003e\u003cli\u003eNo straight inlet run needed\u003c\/li\u003e\u003cli\u003ePulse or 4 … 20 mA output as accessory\u003c\/li\u003e\u003cli\u003eHeating jacket for media that solidify\u003c\/li\u003e\u003cli\u003eAmbient temperature -40 … +50 °C\u003c\/li\u003e\u003c\/ul\u003e","brand":"octogon GmbH","offers":[{"title":"Default Title","offer_id":57453641335110,"sku":null,"price":0.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/5558\/6374\/files\/QZKH_produkt.webp?v=1790331901","url":"https:\/\/octogon-sensors.com\/en\/products\/qzkh-oval-gear-flowmeter-with-mechanical-counter","provider":"octogon GmbH","version":"1.0","type":"link"}