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HOBO RH Temp 2x External Sensor Logger-SUPERCEDED

This four-channel logger has internal temperature and user-replaceable RH sensors and two external channels which accept a wide range of external sensors. This model records up to 7943 measurements.

HOBO RH Temp 2x External Sensor Logger H08-007-02


Superceded by HOBO MX1101


• 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 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 when extended from the case.

Relative Humidity - The HOBO's user-replaceable relative humidity sensor is temperature compensated, and the logger's relative humidity accuracy is ±5% over the entire +5°C to +50°C operating range of the sensor when used with BoxCar Pro 4.3 or BoxCar 3.7.3 or later version. NOTE: Accuracy specifications reflect improvements made to BoxCar Pro 4.3 and BoxCar 3.7.3.

Earlier software versions provide ± 5% accuracy except in elevated humidity environments (60% to 95% non-condensing and non-fogging where accuracy is ±10%). Upgrading to BoxCar Pro 4.3 or BoxCar 3.7.3 or later version will bring all current and old data file accuracy to ±5% for the full operating range. The relative humidity sensor's operating RH range is 25% to 95% at +25°C for logging intervals of 10 seconds or longer.

NOTE: The HOBO's RH sensor will be damaged by condensation. It must not be exposed to fog, mist or other condensing conditions!

External Input with Onset Sensors - The HOBO H8 loggers accept a range of Onset temperature and AC current sensors. For compatible sensors please contact us.

When using multiple voltage inputs, current inputs, or a combination of both input types, keep in mind that the (-) from your current source(s) and the (0V) line of your voltage source(s) will be tied together when installed on the logger. The lines must be at the same voltage potential or inaccurate readings or even damage to the logger may occur. At the logger, the common line that these external sensors share is not connected to the ground of the logger’s PC interface cable jack. The (-) line of any 4-20mA cable or the (0V) line of any Voltage input cable should be kept floating or isolated from ground to avoid damaging your logger, especially when the PC interface cable is also connected.

Operating range (logger): -20°C to +70°C, 0 - 95% RH non-condensing
Time accuracy: approx. ±1 minute per week (±100 ppm at +20°C)
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

Ordering Information:
H08-007-02 - HOBO RH Temp 2x External Sensor Logger