SIKA positive displacement flow sensors are highly accurate transmitters that measure volume flows. They work on the positive displacement principle.The flowing medium causes a pair of gear wheels to rotate. The sensor is manufactured to the highest accuracy and is then precisely assembled. The rotation is scanned by two non-contact pick-offs. As each tooth generates a pulse, the resolution is very high. Very low flow rates can be accurately measured and small volumes can be dosed.

The measurement unit contains two pick-offs that are circumferentially offset by ¼ of a tooth pitch to generate a 2 channel flow-proportional frequency signal. Suitable processing of the signal provides an greater resolution and the option to identify the flow direction.

It is possible to measure not only high viscosity media but also media whose viscosity varies e.g. because of changes in temperature. Vice versa, measurement accuracy decreases with viscosities below 10 mm/s² and especially in the lower flow rate range.By their very nature gear type flow sensors require the measured medium to be slightly lubricating.Use with non-lubricating media, e.g. water, is impossible.Convincing advantages

• 7 different component sizes available
• Viscosity range: 1...100.000 mm²/s
• Measurement accuracy: ±0.3 % of reading
• Temperature of the medium: -30 up to +120 °C (standard version)
• Version HT for temperatures up to 150 °C with thermally insulated pre-amplifier (optional)
• Types usable in explosion-hazardous areas according to ATEX (max. temperature of the medium: 80 °C)
• Various housing and seal materials provide a universal applicability with different measurement media
• Standard process connection via subplates, i.e. quickly exchangeable without longer process stops
• Signal processing by SIKA display and read out devices, available with and without monitoring function

• Transformation into analogue signals (0-20 mA, 4-20 mA, or 0-10 V) or optional processing via RS 232 C
• Accurate dosing by electronic batch controllers