HOBO Relative Humidity/Temperature/Light/External Data Logger

Part # H08-004-02
This product is discontinued.

Upgrade to U12-012


A four-channel data logger with internal temperature, light intensity, and user-replaceable relative humidity sensors, and one external channel that accepts a wide range of external sensors. This data logger records up to 7,943 measurements.

Highlighted Features

  • 8-bit resolution
  • Programmable start date/time
  • Programmable sampling rate (0.5 second to 9 hours)


The country of origin for this product is the United States. To see the full specifications for this product, please see our product manual found under the documentation tab if available.

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), full dependance shown in manual
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)

BoxCar® Pro 4.3 Starter Kit
Compatible Sensors
4-20 mA
4 to 20 mA Input
AC Current
2-20 Amp split-core AC current
5-50 Amp split-core AC current
10-100 Amp split-core AC current
20-200 Amp split-core AC current
60 - 600 Amp split-core AC current
AC Voltage
ConLab 0-150 Volt AC Transmitter
ConLab 0-300 Volt AC Transmitter
Items used with above items
4 to 20 mA Input
Carbon Dioxide
Telaire 7001 CO2
Items used with TEL-7001
Sensor output cable for U12 loggers
DC Voltage (0-2.5v, 5v, 10v)
0 to 2.5 VoltsDC Voltage Input
Air/Water/Soil Temperature (1' cable)
Air/Water/Soil Temperature (20' cable)
Air/Water/Soil Temperature (50' cable)
Stainless Steel Temperature Probe (6' cable)
Air/Water/Soil Temperature (6' cable)
Temperature (6')
Communication Cables
USB Interface Cable(s)
Interface Cable for PCs
Replacement batteries (Pack of 5)
Replacement RH sensor for H8, U10, or UX100-003 indoor data logger
Carrying Case
Pelican Case
NIST Setup & Certifications
Setup Charge for NIST Traceable
NIST Temperature point
Documentation for the H08-004-02

HOBO H8 Family Data Loggers (H08-00x-02) User's Manual