This test demonstrates the ability of the clean room to recover in designed class being contaminated for short interval. A useful endpoint is one-hundredth of the original concentration. Send Enquiry Enquiry For: Clamp Meter3 ½ Multimeter4 ½ Multimeter5 ½ Multimeter6 ½ MultimeterVoltmeterMulti-function Process CalibratorMulti-Product CalibratorUniversal CalibratormA/mV Calibrator