The REED LM-8000 is a compact 6-in-1 environmental meter combining air velocity, air temperature, ambient temperature, relative humidity, light level and contact temperature into one handheld unit built for one-handed use. Air velocity covers roughly 0.2 to 30 m/s and temperature spans a very wide -100C to 1300C range, with data hold and min/max recall for field checks. At about 160 g it is light enough for HVAC, electrical and general maintenance rounds. This item ships with an add-on NIST-traceable calibration certificate.