Cal Lab has purchased a new Thunder Scientific Model 2500 Humidity Generator. It is a self-contained system capable of producing atmospheres of known humidities using the NIST proven, “two-pressure” principle. Virtually any humidity and temperature point may be generated, for any length of time. Humidity Range: 10 to 95% ±0.5 %RH, Temperature Range: –10 to +70 ºC ±0.06 ºC.