Humidity transmitter for intrinsically safe applications
Serie HLX300ex

The 2-part housing concept facilitates simple installation of the humidity transmitter and rapid replacement of the measuring device without time-consuming re-cabling. This means that the HLX300Ex can be used directly in an explosion hazard environment in zones 0 / 20.

The easy-to-clean, elegant stainless steel housing is an important feature for use in the pharmaceutical and chemical industries. Humidity sensor technology, proven in practice over many years, provides reliable measurements with long-term stability in challenging industrial applications.
One model for wall mounting, a version with up to 10 m remote measurement probe or an optional display make the HLX300Ex humidity sensor versatile in usage. The device is designed using 2-wire technology, and the power supply can be provided via any intrinsically safe power supply device. The measurements are issued on 2 analogue outputs with 4…20mA, whereby the outputs can be easily modified for the relevant measurement task by the user.

In addition to the measurements for relative humidity and temperature, the HLX300Ex humidity transmitter delivers all standard calculated values, such as dew-point temperature [Td], wet-bulb temperature [Tw], absolute humidity [dv], etc….

Moisture measurement in oil:

In the same way as humidity measurement in air, the HLX300Ex can also be used for moisture measurement in oil. The moisture content of an oil can be issued as absolute in [ppm] or relative as water activity [aw].
Typical applications for moisture measurement in oil are found in systems for cleaning/drying oil or on oil platforms for online monitoring of lubrication and gear oils.

Features/benefits:

• Can be used in gas and dust explosion hazard areas
• Direct mounting in zones 0 / 20
• Output of calculated humidity functions
• Maximum precision up to 180°C
• Pressure-tight up to 300bar
• Different models for wall mounting or with remote sensing probe
• Moisture measurement in oil

Typical applications:

• Chemicals industry
• Pharmaceuticals industry
• Explosion hazard storage rooms
• Power stations
• Grain mills
• Oil platforms