Onset HOBO Four Channel USB Temperature/Humidity/Light/External Input Data Logger
with 12-bit resolution
The temperature, RH, light with external input logger is a four-channel electronic recording device that provides temperature, relative humidity, relative
indoor light level measurements and accepts one external input.
The external channel accepts a wide range of external
sensors and input cables for temperature, CO2, AC Current,
4-20mA, and DC Voltage. The data logger
features 12 bit resolution, high accuracy, data storage of 43,000 samples and 1 year user-replaceable battery.
Temperature: -20°C to 70°C (-4°C to 158°F) Humidity: 5% to 95% RH Light Intensity: 1 to 3000 footcandles (lumens/ft2)* External Input Channel: 0 to 2.5 Volts DC
Accuracy
Temperature: ±0.35°C from 0°C to 50°C Humidity: ±2.5% RH from 10% to 90% (10°C to 50°C) ** Light Intensity: Indoor Measurement of Relative Light Levels External Inputs: ±2 mV, ±2.5% of Absolute Reading
Resolution
Temperature: 0.03°C at 25°C (0.05°F at 77°F) Humidity: 0.03% RH