HOBO® H8 Temperature & Relative Humidity   |    Ref: OC-H08-003-02

HOBO® H8 RH/Temp Logger
Measure:
Temperature
Relative Humidity

Features and specifications

Capacity: 7943 measurements total
User-selectable sampling interval: 0.5 seconds to 9 hours, recording times up to 1 year
Readout and relaunch with optional HOBO Shuttle
Internal temperature sensor on 4" wire can extend from case
Models with external input accept external sensors for temperature, AC current, 4-20 mA and 0-2.5 Volts DC
Precision components eliminate the need for user calibration
Drop-proof to 5 feet
Mounting kit included (hook/loop, magnet, and tape)
Programmable start time/date
Memory modes: stop when full, wrap-around when full
Nonvolatile EEPROM memory retains data even if battery fails
Blinking LED light confirms operation
User-replaceable battery lasts 1 year
Battery level indication at launch
Operating range: -4°F to +158°F
(-20°C to +70°C), 0 to 95% relative humidity, non-condensing, non-fogging (RH sensor range at right)
Time accuracy: ±1 minute per week at +68°F (+20°C)
Size/Weight: 2.4 x 1.9 x 0.8" (68 x 48 x 19 mm)/approx. 1 oz.(29 gms)
Compliance certificate available
NIST-traceable temperature accuracy certification available
Measurement specifications

Temperature (internal sensor)

Range: -4°F to +158°F (-20°C to +70°C)
Range for internal sensor when used outside of case:
-40°F to +248°F (-40°C to +120°C)
Accuracy: ±1.27°F (±0.7°C) at +70°F, see plot below
Resolution: 0.7°F (0.4°C) at +70°F
Response time still in air: 15 min. typical with sensor inside case; 1 min. typical with sensor outside case


Relative humidity (user-replaceable RH sensor)

Range: 25% to 95% RH at +80°F for intervals of > 10 seconds, non-condensing and non-fogging, see plot below
Accuracy: ±5%
Response time 10 min. typical in air
Sensor operating environment: +41°F to +122°F (+5°C to +50°C) non-condensing and non-fogging



A software starter kit is required for operation
BoxCar Pro or BoxCar starter kits are available. Each starter kit includes software, computer interface cable and software manual. If you already have logger software, you can refer to the Logger Software Compatibility Chart. Upgrades for BoxCar Pro and BoxCar are available on this website. USB Serial Adapter available.