Pro v2 External Temp - eucatech Store


Pro v2 External Temp

Sale priceR 6,881.28
SKU: U23-003



A weatherproof data logger with two external soil/water temperature probes on 6-foot cables for fast sensor response and deployment in tight spaces.

Diagram of data retrieval from U23 data logger using optic base station.


Data Sheet
User Manual


Highlighted Features

  • Weatherproof housing for use in outdoor or condensing environments
  • High accuracy
  • Small-diameter external sensor versions for measurements in tight spaces
  • Optic USB interface for fast and reliable download
  • Compatible with HOBOware and HOBOware Pro software for logger setup, graphing, and analysis


    Measurement U23-001A Internal Sensor U23-002A External Sensor U23-003 and U23-004 External Sensors
    Operation Range -40 to 70°C (-40 to 158°F) -40 to 70°C (-40 to 158°F) -40 to 100°C (-40 to 212°F), with tip and cable immersion in fresh water up to 50°C (122°F) for one year
    Accuracy ±0.25°C from -40 to 0°C ±0.25°C from -40 to 0°C ±0.21°C from 0° to 50°C (±0.38°F from 32° to 122°F); see Plot A
    ±0.2°C from 0 to 70°C ±0.2°C from 0 to 70°C
    Resolution 0.04°C (0.072°F) 0.04°C (0.072°F) 0.02°C at 25°C (0.04°F at 77°F); see Plot A
    Response Time 10 minutes in air moving 1 m/sec 3 minutes, 45 seconds in air moving 1 m/sec 3 minutes in air moving 1 m/sec; 30 seconds in stirred water
    Drift <0.01°C (0.018°F) per year <0.01°C (0.018°F) per year <0.1°C (0.18°F) per year
    Relative Humidity Sensor U23-001A, U23-002A only
    Operation Range 0 to 100% RH, -40° to 70°C (-40° to 158°F)
    Exposure to conditions below -20°C (-4°F) or above 95% RH may temporarily increase the maximum RH sensor error by an additional 1%
    Accuracy ±2.5% from 10% to 90% RH typical to a maximum of ±3.5% including hysteresis at 25°C (77°F); below 10% and above 90% ±5% typical
    Resolution 0.05%
    Response Time 40 minutes in air moving 1 m/sec with protective cap
    15 seconds in air moving 1 m/sec
    Drift <1% per year typical
    Operation Range -40° to 70°C (-40° to 158°F)
    Real-time Clock ±1 minute per month 0° to 50°C (32° to 122°F)
    Battery 1/2 AA, 3.6 Volt lithium, user-replaceable (HP-B)
    Battery Life (Typical Use) 3 years with 1 minute or greater logging interval
    Memory (Non-Volatile) 64K bytes memory (approx. 21,000 temperature and RH measurements)
    Environmental Rating Electronics housing is NEMA 6P equivalent (tolerant of brief submergence); Units with RH sensors are NEMA 4 equivalent (splash-resistant)
    Launch Modes Immediate start; delayed start
    Logging Interval Fixed-rate or multiple logging intervals, with up to 8 user-defined logging intervals and durations; logging intervals from 1 second to 18 hours
    Offload Modes Offload while logging; stop and offload
    Battery Indication Battery voltage can be viewed in status screen and optionally logged in datafile. Low battery indication in datafile.
    Weight U23-001A: 57 g (1.5 oz); U23-002A: 118 g (3.1 oz); U23-003: 138 g (3.7 oz); U23-004: 102 g (2.7 oz)
    Dimensions Housing measures 10.2 × 3.8 cm (4.0 × 1.5 in.)
    NIST Certificate Temperature certificate available for additional charge