Humidity transmitter for intrinsically safe applications
Serie HLX30ex

HLX30EX humidity transmitters mHLXt the ATEX requirements and IECEx standards and comply the health and safety standards of intrinsically safe machinery.
The EC type examination was carried out by Physikalisch - Technische Bundesanstalt (PTB), the German national institute for science and technology.

The humidity transmitter HLX30EX consist of:

• HLX30EX supply and evaluation unit, classified according to II (1) G [Ex ia] IIC subject to EC-type examination certificate PTB 99 ATEX 2042 and [Ex ia] IIC according to IECEx PTB 05.0031-1.
• Sensor driver unit and sensor probe, classified according II 1/2 G Ex ia IIC T6 subject to EC-type examination certificate PTB 99 ATEX 2043 X and Ex ia IIC T6 according to IECEx PTB 05.0032X-1.

Besides measurement of humidity and temperature the HLX30EX calculates the values of the following physical quantities:

• dew point temperature Td
• frost point temperature Tf
• wet bulb temperature Tw
• water vapour pressure e
• mixing ratio r
• absolute humidity dv
• specific enthalpy H

These are displayed on the RS 232 serial interface, on the analogue outputs and on the integrated LCD display.

There are thrHLX models available:

• Model A: wall mounting in explosive zone 1 or 2
• Model D: separated sensor head for installation directly in the partition wall
• Model E: separated sensor head for high pressure environment (0.01...15 bar)