Onset computer corporation HOBO H8 Family 4-Channel Temp, RH, Light, External (Air, Water, Soil, Etc.)

Condition: New – Open box; 

Description: Unused in package as pictured.   

  • 12-bit resolution provides high accuracy
  • Large memory for long-term deployments or fast sampling
  • Five models to choose from, with flexible measurement options
  • Programmable and push-button start
Light Intensity: light intensity sensor approximates the sensitivity of the human eye. The sensor's response versus light wavelength is shown in plot D (Gray line) along with the eye response (black line) The nominal range is 2 to 600 footcandles (lumens/ft2); maximum value can vary from 300 to 900 footcandles (lumens/ft2). The sensor's angular response is roughly cosine dependent, with 0 being directly above the sensor.

Measurement range:
Temperature: -20° to 70°C (-4° to 158°F)
RH: 5% to 95% RH

Accuracy:
Temperature: ± 0.35°C from 0° to 50°C (± 0.63°F from 32° to 122°F), see Plot A
RH: ±2.5% from 10% to 90% RH (typical), to a maximum of ±3.5% including hysteresis, see Plot B.

Resolution:
Temperature: 0.03°C at 25°C (0.05°F at 77°F), see Plot A 

RH:0.03% RH

Sample Rate:
1 second to 18 hours, user selectable

Drift
Temperature: 0.1°C/year (0.2°F/year)
RH: <1% per year typical

Response time in airflow of 1 m/s (2.2 mph)
Temperature: 6 minutes, typical to 90%
RH: 1 minute, typical to 90%

Time accuracy:  ± 1 minute per month at 25°C (77°F), see Plot C

Operating Temperature:

Logging:           -20° to 70°C (-4° to 158°F); 0 to 95% RH (non-condensing)
Launch/readout: 0° to 50°C (32° to 122°F), per USB specification

Battery life:      1 year typical use

Memory:          64K bytes (43,000 12-bit measurements)

Weight:            46 g (1.6 oz)

Dimensions:    58 x 74 x 22 mm (2.3 x 2.9 x 0.9 inches)