Pro v2 External Temp/RH Data Logger - eucatech Store
Pro v2 External Temp/RH Data Logger - eucatech Store


Pro v2 External Temp/RH Data Logger

Sale priceR 7,024.64
SKU: U23-002A



A weatherproof data logger with an external temperature and r relative humidity sensor on a 6-foot cable for fast sensor response and deployment in tight spaces. The user-replaceable relative humidity sensor provides superior durability in humid environments.

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


Quick Start guide
User Manual


Highlighted Features

  • Weatherproof housing for use in outdoor or condensing environments
  • High accuracy
  • Relative humidity sensor 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


    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
    (±0.45 from -40 to 32°F) (±0.45 from -40 to 32°F)
    ±0.2°C from 0 to 70°C ±0.2°C from 0 to 70°C
    (±0.36 from 32 to 158°F) (±0.36 from 32 to 158°F)
    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 (90%) 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 (90%) U23-001A: 40 minutes in air moving 1 m/sec with protective cap
    U23-002A: 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)
    Materials All models: ASA styrene polymer housing and mounting clamp; polypropylene protective cap; Buna-N o-ring(s); U23-001A, U23-002A only: ASA styrene polymer RH sensor cap; modified hydrophobic polyethersulfone membrane
    Cables U23-001A: No cables
    U23-002A: One 184 cm (6 ft) PVC cable; sensor diameter 1 cm (0.38 in.)
    U23-003: Two 184 cm (6 ft) PVC cables; sensor diameter 0.5 cm (0.20 in.)
    U23-004: One 184 cm (6 ft) PVC cable; sensor diameter 0.5 cm (0.20 in.)
    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


    In what environment does this data logger operate?

    This data logger operates in an outdoor environment.

    What measurements does this data logger support?

    The U23-002 data logger supports the following measurements: Relative Humidity and Temperature