TWW 201 – One-channel Position Transmitter

The TWW 201 transmitter is a one-channel position transmitter designed for static displacement measurement using eddy current proximity probes. It provides accurate non-contact measurement of object position and integrates fault monitoring for reliable performance.

Reliable Static Position Monitoring

The TWW 201 enables two selectable measuring ranges depending on the probe type, adjustable via a front panel switch. It offers both current and voltage outputs: a 4–20 mA current signal and a filtered RAW voltage signal from +2 V to +10 VDC with sensitivity up to 8 V per measuring range (4 V/mm at a 2 mm range).

The transmitter includes front-panel adjustment for offset (±0.75 mA) and sensitivity (±10%) to compensate for installation and material influences. Integrated fault detection continuously monitors for cable interruptions, short circuits, and when the target is out of range. Faults are indicated by a red LED and as a 2 mA alarm signal at the analog output.

Key Benefits

• Accurate static displacement monitoring with eddy current probes

• Dual outputs: 4–20 mA current signal and 2–10 VDC RAW voltage signal

• Integrated fault detection with LED indication and alarm signal

• Offset and sensitivity adjustments for installation flexibility

Application Areas

The TWW 201 is widely used in industrial environments where static displacement must be monitored:

• Shaft position monitoring in turbines and generators

• Static displacement in pumps and compressors

• Machine alignment and condition monitoring

• Industrial process machinery diagnostics

Technical Specifications

• Measuring ranges: probe-dependent, 2 selectable ranges via switch

• Frequency range: 0–2 Hz

• Current output: 4–20 mA, max. load 500 Ω

• Voltage output: +2 to +10 VDC, sensitivity 8 V/range (4 V/mm at 2 mm range)

• Offset adjustment: ±0.75 mA, via potentiometer

• Sensitivity adjustment: ±10% via potentiometer

• Power supply: +24 VDC (18–30 VDC), max. 80 mA, galvanically separated

• Housing: Polyamide, IP40, 114.5 × 99 × 22.5 mm, approx. 200 g

Ensure precise displacement monitoring with the TWW 201 transmitter