The Pro family data loggers are designed for years of reliable use in harsh outdoor or condensing environments.
The Temp/RH sensor provides fast response and superior durability in humid conditions, with small-diameter external sensors available for installation in tight spaces or building ducts.
Features
Weatherproof housing for use in outdoor or condensing environments
High accuracy temperature and RH sensors
Replaceable RH sensor (RH sensor models only) provides fast response and superior recovery from condensing conditions
Small-diameter external sensor versions for measurements in tight spaces
Optic USB interface for fast and reliable download
Models Available
U23-001 Internal Temperature & RH
U23-002 External Temperature & RH
U23-003 2 x External Temperature Sensors
U23-004 1 x Internal Temperature & 1 x External Temperature
General Specifications
Memory: 42,000 measurements
Sampling Rate: 1 second to 18 hours Fixed rate or multiple logging intervals, with up to 8 user-defined logging intervals and durations.
Time accuracy: 1 minute/month at 25 °C
Battery life: 3 years (typical); user-replaceable 1/2 AA 3.6 Volt lithium battery
Dimensions: Housing measures 10.2 x 3.8 cm
Sensor Specifications
Internal Temperature
Measurement range: -40 to 70°C
Accuracy: ±0.2 °C over 0 to 50°C
Resolution (12-bit): 0.02°C at 25°C
Response time: 40 minutes (to 90% in airflow of 1 m/sec)
Use with RS1 radiation screen for outdoor installations (see below)
External Temperature
Measurement range: U23-002: -40 to 70°C; U23-003 & -004: -40 to 100°C; sensor tip and cable immersion in fresh water up to 50°C for one year
Accuracy: ±0.2°C over 0 to 50°C
Resolution (12-bit): 0.02°C at 25°C
Response time: U23-002: 5 minutes (to 90% in airflow of 1 m/sec); U23-003 & -004: 3 minutes (to 90% in airflow of 1 m/sec), 30 seconds (to 90% in water)
External Sensor Diameter: .5 cm
External Sensor Cable Length: 1.8 m
Use with RS3 radiation screen for outdoor installations (see below)
Relative Humidity
Measurement range: 0 to 100% RH
Accuracy: ±2.5% from 10 to 90%
Resolution (12-bit): 0.03% RH
Response time: U23-001: 10 minute typical (to 90% in airflow of 1 m/sec; RH change only);
U23-002: 4 minutes typical (to 90% in airflow of 1 m/sec; RH change only)
External Sensor Diameter: 1.0 cm
External Sensor Cable Length: 1.8 m
Required Software
HOBOware Software and an Optic USB Base Station* with Coupler, are required to operate the HOBO Pendant loggers. The Optic USB Base Station includes an Optic Base Station and Coupler. *The HOBO Waterproof Shuttle can also be used as a base station.
