• NOTE: HOBO data loggers require HOBOware software and USB cable (USB interface cable included w/BHW-PRO-CD purchase, ONLY)
• Data logger with weatherproof housing and external temperature and relative humidity sensor on 6-foot cable for fast sensor response and deployment in tight spaces
• Relative humidity sensor features fast response and superior durability in humid 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
• Environments: U23-002A for use in outdoor environments
• Measurements: Dew Point, Relative Humidity (RH) and Temperature

Temperature Sensor

• External sensor operation range: -40 to 70°C (-40 to 158°F)
• Accuracy: ±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)
• Resolution: 0.04°C (0.072°F)
• External sensor response time (typical to 90%): 3 minutes, 45 seconds in air moving 1 m/sec
• Drift: <0.01°C (0.018°F) per year

Relative Humidity Sensor

• 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 maximum RH sensor error by additional 1%
• Accuracy: ±2.5% from 10% to 90% RH typical to 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%): 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: ASA styrene polymer housing and mounting clamp; polypropylene protective cap; Buna-N o-ring(s); ASA styrene polymer RH sensor cap; modified hydrophobic polyethersulfone membrane
• Cables: One 184 cm (6 ft) PVC cable; sensor diameter 1 cm (0.38 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