Humidity and Temperature Transmitters

Water in its gaseous phase (water vapor) is also a component of air mixture, and under normal conditions, behaves like an ideal gas. The concentration of water vapor in air is limited: the saturation vapor pressure. There is a maximum partial pressure of vapor, which depends on temperature. Air, when it is at high temperatures, can take more vapor than it can at low temperatures. Relative humidity (RH) is defined as the ratio between the actual partial vapor pressure and the saturation vapor pressure above water.

In many industrial applications, it is necessary to measure the relative humidity and temperature with humidity transmitters or, in special demanding cases, with a high temperature humidity sensor. Many production and manufacturing processes are dependent on the right humidity and temperature; pharmaceutical and chemical products wouldn’t exist if the humidity and temperature were not strictly controlled.

Humidity transmitters are available with many different qualities; however, common features are:

• Robust and sturdy enclosure with at least a high protection class IP65 (NEMA4X)
• Stainless steel probes with a choice of filters
• Analogue and digital outputs
• The capability to calculate other values, such as, absolute humidity, dewpoint, temperature, enthalpy, etc.

For applications of up to 180 °C (365 °F), humidity transmitters should be equipped with a high-temperature industrial humidity sensor.

The series EE23, EE310, and EE33 are industrial transmitters that are meant to measure humidity and temperature under demanding environmental and process-related conditions. The latter two can be equipped with a high-temperature industrial humidity sensor.

The EE300Ex belongs to the same line of these industrial transmitters, but is specifically designed for use in intrinsically safe applications.

Due to their excellent reliability and long-term stability under normal operation conditions, the E+E Elektronik industrial relative humidity and high temperature transmitters do not require any maintenance. For use in a high-polluted environment, the filter cap should be periodically exchanged with a new, original one. For high-accuracy requirements under extreme humidity and temperature working conditions, the transmitters can be periodically re calibrated.

For further questions regarding humidity sensors or industrial transmitters, please contact us by calling: 1-888-358-2518. Our experts at JLC International are more than willing to help with the selection process to meet all of your needs.

Please note: Manual data files can be quite large, please be patient while downloading. The manuals are for information purposes only and shouldn’t be used for operating the instrument.