KM4107 Hygrometer, with instructions and case

Description

Hand-held instrument for measuring humidity of air or gas. Requires a 9-volt battery (not included). Case and instructions included:
Specs:
Measurement Range
Air velocity: 0 to 6000 ft/min
Temperature: -10 to 70 degrees C, 14 to 135 degrees C
Note: the instrument may be used over the full temperature range, but the air velocity measurement accuracy is reduced outside the 0 to 40 degrees C range
Accuracy
Air velocity: +/- 3% of reading. +/- 1% of full scale
Temperature: +/- 1 degree C, +/- 2 degrees F
Resolution
Air velocity: 0.1 m/s, 10 ft/min
Temperature: 0.1 degree C & F
Dimensions
Instrument: 130 x 70 x 36 mm
Probe: 400 x 8 mm (tip 12 mm)
Extension: 400 x 12 mm
Weight
Instrument: 250 grams
Probe: 150 grams