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HOBO U23 Pro v2 Temperature/Relative Humidity Data Logger – U23-001
HOBO U23 Pro v2 Temperature/Relative Humidity Data Logger – U23-001
HOBO U23 Pro v2 Temperature/Relative Humidity Data Logger – U23-001

HOBO U23 Pro v2 Temperature/Relative Humidity Data Logger – U23-001

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◤OVERVIEW

The HOBO Pro v2 Temperature/Relative Humidity data logger is a weatherproof data logger with built-in temperature and relative humidity sensors. The Relative Humidity sensor provides superior durability in humid environments and is user-replaceable.

HOBO-Prov2-Loggersview

  • Weatherproof housing for use in outdoor or condensing environments
  • High accuracy
  • Replaceable 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
  • Compatible with HOBOware and HOBOware Pro software for logger setup, graphing and analysis (HOBOware Pro is required when using the U-DTW-1 Waterproof shuttle)


In what environment does this data logger operate?

This data logger operates in an outdoor environment.

What measurements does this data logger support?

The U23-001 data logger supports the following measurements:Relative Humidity and Temperature

Temperature Sensor

  • Operation range internal sensors:-40° to 70°C (-40° to 158°F)
  • U23-002 external temperature sensor:-40° to 70°C (-40° to 158°F)
  • U23-003 and U23-004 external sensors:-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:±0.21°C from 0° to 50°C (±0.38°F from 32° to 122°F)
  • Resolution:0.02°C at 25°C (0.04°F at 77°F); see Plot A in the manual
Response Time (typical to 90%)
  • U23-001 internal sensor:40 minutes in air moving 1 m/sec
  • U23-002 external temperature sensor:5 minutes in air moving 1 m/sec
  • U23-003 and U23-004 external sensors:3 minutes in air moving 1 m/sec; 30 seconds in stirred water
  • Stability (drift):< 0.1°C (0.18°F) per year
Relative Humidity Sensor (U23-001, U23-002 only)
  • Operation range:0-100% 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 (typical to 90%)
  • U23-001:40 minute in air moving 1 m/sec with protective cap
  • U23-002:5 minutes in air moving 1 m/sec with protective cap
  • Stability (drift):< 1% per year typical
Logger
  • 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 (part # 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)
  • U23-001, U23-002 only:ASA styrene polymer RH sensor cap; modified hydrophobic polyethersulfone membrane
Cables
  • U23-001:No cables
  • U23-002: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.)
Weight
  • U23-001:57 g (1.5 oz)
  • U23-002:118 g (3.1 oz)
  • U23-003:138 g (3.7 oz)
  • U23-004:102 g (2.7 oz)
More info.
  • 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 (refer to HOBOware software manual)
  • 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.
  • Dimensions:Housing measures 10.2 × 3.8 cm (4.0 × 1.5 in.)
  • NIST certificate:Temperature certificate available for additional charge
  • The CE Marking identifies this product as complying with the relevant directives in the European Union (EU).

  • Datasheet|get
  • User's Manual|get