Onset HOBO U23 Pro v2 Temp/RH Loggers

HOBO Pro v2 data loggers are weatherproof loggers that provide high-accuracy temperature and relative humidity measurements in a wide range of outdoor environments.

Features

  • Weatherproof housing for use in outdoor or condensing environments
  • Small-diameter external sensor versions for measurements in tight spaces
  • Optic USB interface for fast and reliable download
Starting At $165.00
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ImagePart#Product DescriptionPriceStockOrder
Onset HOBO U23 Pro v2 Temp/RH LoggersU23-004 HOBO U23 Pro v2 internal temperature/external temperature logger, 6 ft. cable
$165.00
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Onset HOBO U23 Pro v2 Temp/RH Loggers U23-003 HOBO U23 Pro v2 internal temperature/2x external temperature logger, 6 ft. cable
$200.00
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Onset HOBO U23 Pro v2 Temp/RH Loggers U23-001A HOBO U23 Pro v2 internal temperature/relative humidity logger
$190.00
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Onset HOBO U23 Pro v2 Temp/RH Loggers U23-002A HOBO U23 Pro v2 external temperature/relative humidity logger, 6 ft. cable
$225.00
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Onset HOBO U23 Pro v2 Temp/RH Loggers
U23-004
HOBO U23 Pro v2 internal temperature/external temperature logger, 6 ft. cable
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$165.00
Onset HOBO U23 Pro v2 Temp/RH Loggers
U23-003
HOBO U23 Pro v2 internal temperature/2x external temperature logger, 6 ft. cable
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$200.00
Onset HOBO U23 Pro v2 Temp/RH Loggers
U23-001A
HOBO U23 Pro v2 internal temperature/relative humidity logger
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$190.00
Onset HOBO U23 Pro v2 Temp/RH Loggers
U23-002A
HOBO U23 Pro v2 external temperature/relative humidity logger, 6 ft. cable
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$225.00
ImagePart#Product DescriptionPriceStockOrder
Onset HOBO Optic USB Base Station BASE-U-4 HOBO optic USB base station
$140.00
5 Available
Onset HOBO Waterproof Shuttle U-DTW-1 HOBO waterproof shuttle
$280.00
3 Available
Onset HOBOware Pro Software BHW-PRO-DLD HOBOware Pro Software for Windows and Mac, download only
$75.00
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Onset HOBOware Pro Software BHW-PRO-USB HOBOware Pro Software for Windows and Mac, USB drive
$99.00
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Onset HOBOware Pro Software BHW-PRO-CD HOBOware Pro Software for Windows and Mac, CD
$99.00
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Onset RS3-B Solar Radiation Shield RS3-B Solar radiation shield
$75.00
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Onset Small Desiccant Pack DESICCANT1 Small desiccant for U23 & UA-001/2/4 loggers, pack of 25
$13.00
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Onset U23 UV Protective Cap U23-CAP U23 UV protective cap, pack of 5
$22.00
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Onset Compliance Certification COMPLIANCE_CERT Compliance certification
$25.00
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HOBO optic USB base station
5 Available
$140.00
HOBO waterproof shuttle
3 Available
$280.00
HOBOware Pro Software for Windows and Mac, download only
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$75.00
Onset HOBOware Pro Software
BHW-PRO-USB
HOBOware Pro Software for Windows and Mac, USB drive
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$99.00
Onset HOBOware Pro Software
BHW-PRO-CD
HOBOware Pro Software for Windows and Mac, CD
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$99.00
Solar radiation shield
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$75.00
Small desiccant for U23 & UA-001/2/4 loggers, pack of 25
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$13.00
U23 UV protective cap, pack of 5
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$22.00
Compliance certification
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$25.00

The HOBO Pro v2 logger’s environmentally rugged case is designed for years of reliable use in outdoor applications. It has enough memory to record over 42,000 12-bit measurements.

The logger uses an optical USB communications interface (via a compatible shuttle or base station) for launching and reading out the logger. The optical interface allows the logger to be offloaded without compromising the electronics. The USB compatibility allows for easy setup and fast downloads.

Temperature Sensor
Operation Range U23-001A internal sensor: -40 to 70°C (-40 to 158°F)
U23-002A 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 U23-001A and U23-002A: ±0.25°C from -40 to 0°C (±0.45 from -40 to 32°F), ±0.2°C from 0 to 70°C (±0.36 from 32 to 158°F)
U23-003 and U23-004: ±0.21°C from 0° to 50°C (±0.38°F from 32° to 122°F); see Plot A
Resolution U23-001A and U23-002A: 0.04°C (0.072°F)
U23-003 and U23-004: 0.02°C at 25°C (0.04°F at 77°F); see Plot A
Response Time
(Typical to 90%)
U23-001A internal sensor: 10 minutes in air moving 1 m/sec
U23-002A external temperature sensor: 3 minutes, 45 seconds 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
Drift U23-001A and U23-002A: <0.01°C (0.018°F) per year
U23-003 and U23-004: <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
(Typical to 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
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 (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
  • HOBO U23 Pro v2 Temp/RH Logger
  • Clamp and mounting screws
  • UV protective cap
Questions & Answers
No Questions
Please, mind that only logged in users can submit questions

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