The new S-503 relative humidity generator/calibrator can generate and hold RH values from 10 percent to 90 percent in 0.1 percent steps. The unit stabilizes to within 0.5 percent relative humidity of the set point in about 10 minutes, and has ports to test up to seven relative humidity transmitters simultaneously. A built-in LCD shows actual chamber RH and temperature, as well as the humidity signals from the test units. A selector switch permits testing of transmitters with the most popular analog output formats. According to the company, while intended for laboratory use, the device is only 3.5 pounds and light enough to be portable. The device is also available as a stand-alone instrument or as a kit complete with carrying case and accessories.
Rense Instruments Division, 11 Old Sugar Hollow Road, Danbury, CT 06810; (203) 792-8686 fax (203) 743-2051;