The LPDT is the world’s smallest loop-powered (2-wire) dewpoint transmitter.

The LPDT is also a fully functional instrument featuring the well proven and easy to use familiar interface. Set-up functions, result display of dewpoint, temperature and optional pressure are accommodated by a miniature custom LCD display and three programming buttons.

The LPDT is also the only loop powered dewpoint transmitter featuring both analog and optional digital outputs.

Analog Output Loop

4 - 20 mA is drawn by the instrument from the power supply, with the current being linear to the selected engineering units. The range of the output is programmable. The output resolution is 0.1°C(dp)

Digital Output Loop (optional)

The instrument can supply digital output by modulating the 4 - 20 mA loop line. The timing and format of the data conforms to RS-232 and the output can be interfaced to a PC or other RS-232 device with an optional adapter.

In the digital mode, the LPDT can be remotely operated and dewpoint and temperature (and pressure if installed) can be read. In the digital mode, multiple units can operate on the same loop cable as a multi-channel instrument.

HTF™ High Capacitance Aluminum Oxide Sensor
The LPDT uses a Xentaur HTF™ high capacitance aluminum oxide sensor and provides a degree of accuracy, speed of response and stability unavailable from other instruments using conventional sensors.