Envco – Environmental Equipment

Features:
• 8-bit resolution
• Programmable start date/time
• Programmable sampling rate (0.5 second to 9 hours)
• Memory modes: Stop when full or wrap-around when full
• User-replaceable battery lasts 1 year (typical)
• Battery level indication at launch
• Blinking LED confirms operation
• Non-volatile memory retains data even if battery fails
• NIST-Traceable temperature accuracy certification available
• Compliance certificate available

Each HOBO H8 logger has an internal temperature sensor on a 4 inch wire which is mounted on the circuit board inside the snap lid case. Typically, the sensor is left inside the case and measures ambient air temperature over the operating range of the logger; -20°C to +70°C (-4°F to +158°F) with a response time of about 15 minutes in still air typical to 90%.

The internal sensor can be placed outside the case when a shorter response time is needed (less than 1 minute in air and about 2 seconds in water typical to 90%). The temperature sensor is capable of measuring temperature from -40°C to +120°C (-40°F to +248°F) when extended from the case.

Light Intensity - The HOBO's 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.

Common Specifications
Operating range (logger): -20°C to +70°C (-4°F to +158°F), 0 - 95% RH non-condensing
Time accuracy: approx. ±1 minute per week (±100 ppm at +20°C or +68°F)
Measurement capacity: 7944 measurements total, stored in non-volatile memory
Size: 2.4" x 1.9" x 0.8"
Weight: approximately 1 oz.
Battery: CR-2032 (lithium) user-replaceable
Battery life (continuous use): 1 year
Storage temperature: -40°C to +75°C (-40°F to +167°F)