The Pressure Probe Type 655W2 measures the hydrostatic pressure and is primarily used for level measurements. Optionally, the probe can be equipped with an additional temperature sensor.
The Pressure Probe Type 655W2 is permanently installed and determines the hydrostatic pressure via the constantly applied water column above the probe. Changes in air pressure are directly compensation by using a vented cable. The output signal rises or falls analogously to the pressure rise or pressure drop. The pressure probe type 655W2 has an analog output signal 4 ... 20 mA. This signal can be used for remote transmission, for connection to a SCADA, various displays or recorders as well as for the control of pumps.
The Pressure Probe Type 655W2 can optionally be equipped with temperature measurement for which an additional temperature sensor is used. The response times are short and fast temperature fluctuations are measured precisely and promptly. The analog temperature signal is also provided via 4..20 mA on 2 separate wires.
To protect the vented cable against moisture and to properly connect the probe to a SCADA, a suitable terminal box (see picture above) is used. With this unit, you ensure the compensation of the air pressure, grounding of the shield and secure connection between the probe and your control system / device.
Power supply voltage
6...30 V DC
4...20mA / 2-wire
Ø22mm x 125mm
Stainless Steel 316Ti
selectable up to max. 300m water column, on request calibration in bar
< 0.1% of selected measuring range
Standard: 0°C to +50°C / other ranges on request
Diameter of cable
PUR jacket with Kevlar core for strain relief and internal pressure compensation tube; very flexible;