The 8070/8071 flow meters are unaffected by the problem of high viscosities encountered with paddle-wheel type flow meters. Instead, they are designed with a pair of meshed (geared) oval rotors that rotate under fluid pressure in an engineered measuring chamber. This arrangement, with precision stainless steel or PPS gears and FKM seals as standard, is characterised by its high levels of reliability, its ability to be used on horizontal, vertical and gravity applications, and its accuracy, which is better than 0.5 per cent of full-scale reading on larger models. In addition, the efficacy of the design means that the meters are not affected by pulsating flow - they can be used with membrane pumps - and they have only a minimal pressure drop of up to 0.5bar when correctly sized.

Precise sensing of flow on the 8070/71 flow meters is accomplished via magnets in the geared rotors. These actuate switches as they rotate and generate pulses; each pulse equates to a known volume of fluid. The switches are reed- or hall-effect sensors, which can be mixed and matched to suit individual applications. However, for operations in hazardous areas where this type of sensing is not allowed, Burkert offers mechanical versions of the flow meters; these drive a gearbox to an associated display unit. The accuracy of these units is better than +/- 1 per cent of reading. The 8070/71 flow meters are available with a choice of aluminium, PPS or stainless bodies to cater for a wide range of applications. They can be rated up to IP65 and are suitable for operation at temperatures up to 800degC with standard PPS rotors, (minimum temperature -400degC). Optional higher temperature rotors can extend operation to 1200degC. In addition, for applications where viscosities exceed 1000cps, Burkert can provide high-viscosity rotors.

Each individual 8070/71 flow meter is supplied with its own traceable metrology calibration report. The units are supplied as standard with BSP connections (1/8- 4inch) with NPT (F) as an option.

Also available are remote mountable displays, transmitter and batch control modules, plus ATEX-approved flow sensors. When combined with their robust construction, precise but highly durable operating mode and high levels of ingress protection, the 8070/71 flow meters can be safely employed across a wide range of industry sectors: food and beverage, oil and gas, chemical, fuel, extraction industries, marine, water and waste treatment, cement, steel, etc.