National Test Equipment

Hart Scientific 5109

The Hart Scientific model 5109 is a lab humidity/temperature recorder.
Specifications:

Temperature Ranges: User selectable: Tone20 to 120F, 40 to 110F, and Tone20 to 50C, 5 to 40C

Temperature Accuracy: Tone1.8F (Tone1.0C)

Humidity Range: 0 to 95% (non-condensing)

Humidity Accuracy: Tone2% between 0 and 60% RH, Tone3% between 61 and 95% RH (at 73F, 23C)

Display Resolution: 1F (1C), 1% RH

Chart Size: 8Tone diameter (203 mm)

Temperature Sensor: Thermistor

Humidity Sensor: Thin film capacitor

Recording Time: User-selectable, 1-, 7-, and 31-day