Process Viscometer KV100-Ex-TM25

The viscometer KV100-Ex works on the principle of a Capillary Viscometer with continual volume flow and measurement of pressure decrease over the measuring capillary.

Its basic components are the driving head and the flow measuring device connected by a spacer tube. The driving head holds a synchronous motor with change gear. The immersion-type measuring unit holds a gear pump, the intake fitting and the exchangeable measuring capillary, as well as ducts for the supply of the process pressure and for the transport of overpressure from the entrance of the measuring capillary to the connections of pressure transducers.

The gear pump, which is driven by the driving head through a shaft via magnetic coupling at constant speed, continually takes a constant volume flow from the process medium and feeds it through the measuring capillary as a steady flow.

The pressure decrease between the two ends of the measuring capillary, which is proportional to viscosity, is investigated by a differential pressure transducer. Pressure differences are transformed into standard electrical signals 4...20 mA, which can be used for display and as a control signal.

For direct installation on containers, tanks, or reactors at any position the viscometer has a DIN flange connection. The inlet of the aspiration tube must always be located within the representative fluid.

The process viscometer can be completed with an electronics unit for more functions of instrument control, signal processing, correction of characteristic lines of the gear pump, as well as for the temperature adjustment of viscosity.

Recommended Applications

Technical Data

viscosity ranges	0 to 3 mPas 0 to 10 mPas 0 to 30 mPas 0 to 50 mPas 0 to 100 mPas 0 to 500 mPas
accuracy	± 1 % of maximum value
pressure range	0 to 2.5 MPa
temperature range	-25 °C to +140 °C
materials with direct fluid contact	1.4571 according to DIN 17440
explosion protection	II 2G EEx de IIB T4 (according to ATEX standard)
degree of protection	IP54
climatic classification	-25/55/30/90//42 (S02)1-3
installation position	any
power supply	motor:    230 V AC (+6% / -10% // 50 or 60 Hz) pressure difference transducer:    24 V DC (+10% / -20% // 20 mA)
data processing	pressure difference transducer (Δp max. 0.05 MPa)
output signal	4 to 20 mA (intrinsically safe)

Optional Accessories

1. Temperature sensor Pt100 optional delivered with transducer 3 temperature ranges -30°C to +60°C, 0°C to +100°C, 0°C to +200°C 2. Control unit KS98 provides supply voltage 24 V DC for differential pressure transducer shows data on display (viscosity, temperature, min./max. viscosity, compensated viscosity) temperature correction of viscosity data according to specified viscosity-temperature equation via large temperature range power supply: 90 to 250 V AC / 48 to 62 Hz protection: according to DIN VDE 0470 / EN 60529 device panel: IP65 housing: IP20 connections: IP00 Control unit KS98