A new line of HVAC relative humidity and temperature transmitters includes the Roline L, which is for the low-cost HVAC and OEM markets, while the Rotronic M Series is for HVAC markets requiring high-performance and flexibility, the manufacturer says. Both of them feature HygroClip digital signal processing hardware. According to the company, calibration is performed with software, eliminating the use of potentiometers; direct connection to the HygroPalm calibrator during field service is possible. The Roline L Series operates between 0% and 100% RH and 0 and 50 degrees C (32 to 122 degrees F) with an accuracy of ±3% RH and ± 0.5 degrees C. The M Series operates between 0% and 100% RH and -40 to 85 degrees C (-40 to 185 degrees F) with an accuracy of ±1.5% RH and ±0.3 degrees C. Options for this series include fixed and interchangeable probes, available local displays, networking, and calculated outputs, such as dewpoint and enthalpy.
Rotronic Instrument Corp., 160 East Main St., Huntington, NY 11743; 631-427-3898; www.rotronic-usa.com (website).