Humidity sensor keeps its cool even in voltatile organic compounds

When measuring humidity in environments with exposure to VOC (voltatile organic compounds), a drift occurs which over time causes faulty measurement results. The sensor needs to be removed and reset by heating, which is not only time-consuming, but ultimately amounts to maintenance costs. This design challenge is addressed by Innovative Sensor Technology (IST) which has introduced the latest member of the HYT series. The HYT 223 allows for an automatic reset without having to remove the sensor. 

Innovative Sensor Technology IST has developed the multi-functional digital humidity and temperature module with an integrated micro-heater with long term stability and which maintains its accuracy long term with minimal drift. The accuracy at 0 to 50 degrees C is ± 1.8 per cent RH at 0 to 90 per cent RH and ± 3.0 per cent RH at 90 to 100 per cent RH.

The HYT 223 is a heatable digital humidity sensor with wide humidity and temperature ranges. Thanks to its PTFE membrane filter, it comes with high chemical resistance, said IST. The sensor is very stable at high humidity, which makes it suitable for monitoring processes with high humidity, e.g. incubators or greenhouses, or in applications chemicals requiring degassing to avoid drift, for example in swimming pools, in cheese production or animal farms.

The sensor has a wide operating temperature range of -20 to +120 degrees C, and a long term drift humidity / temperature of less than 0.5 per cent  RH/a / less than  0.05K/a.

The calibrated and temperature compensated sensor is suitable for the moisture analysis from low to high humidity ranges in environments with high exposure to VOC. The HYT 223 contains a micro heating structure which allows for thermal reconditioning. A reconditioning cycle is recommended in challenging atmospheres and conditions. Length and interval required depend on the application environment.

Innovative Sensor Technology IST specialises in micro system technology, services and solutions for industrial measurement applications. 

It is a manufacturer and partner for physical, chemical and biological sensors. Its product range contains thin film platinum and nickel RTD temperature sensors, capacitive humidity sensors, thermal mass flow sensors, conductivity and biosensors. IST AG also manufactures a broad portfolio of calibrated humidity modules. A technical team offers consulting, development and production of challenging customer requests in the field of micro system technology.

IST sensors are found in measuring instruments for various applications, such as HVAC, automation, appliance, medical, test and measurement, aerospace, bio measurement and process control.

Founded in 1991, Innovative Sensor Technology is headquartered in Ebnat-Kappel, Switzerland in the mountain region of Toggenburg. In 2005, Innovative Sensor Technology became part of the Endress+Hauser Group, headquartered in Reinach, Switzerland. The Endress+Hauser Group specialises in measuring instruments, services and solutions for industrial process engineering.

Latest News from Softei

This news story is brought to you by, the specialist site dedicated to delivering information about what’s new in the electronics industry, with daily news updates, new products and industry news. To stay up-to-date, register to receive our weekly newsletters and keep yourself informed on the latest technology news and new products from around the globe. Simply click this link to register here: Softei Registration