U22-001 HOBO Water Temperature Pro v2 Data Logger

Overview

A durable water temperature data logger with 12-bit resolution. Complete with a precision sensor for ±0.2°C accuracy, this logger measures temperatures between -40°C and 70°C (-40°F to 158°F) in air and up to 50°C (122°F) in water. The waterproof, streamlined case allows for extended deployment in freshwater or saltwater. And the optical USB interface lets you offload data even while the logger is wet or under water. A solar radiation shield is required to obtain accurate air temperature measurements in sunlight (either the assembly-required RS1 Solar Radiation Shield or the pre-assembled M-RSA Solar Radiation Shield).

Features

    Research-grade measurements at an affordable price
    Waterproof to 120 meters (400 feet)
    Data readout in less than 30 seconds via fast Optic USB interface
    Compatible with HOBOware and HOBOware Pro software for logger setup, graphing, and analysis

Specifications

Operation range†
    -40° to 70°C (-40° to 158°F) in air; maximum sustained temperature of 50°C (122°F) in water
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
Response time
    (90%) 5 minutes in water; 12 minutes in air moving 2 m/sec (typical)
Stability (drift)
    0.1°C (0.18°F) per year
Real-time clock
    ± 1 minute per month 0° to 50°C
    32° to 122°F
Battery
    2/3 AA, 3.6 Volt Lithium, factory-replaceable ONLY
Battery life (typical use)
    6 years with 1 minute or greater logging interval
Memory (non-volatile)
    64K bytes memory (approx. 42,000 12-bit temperature measurements)
Weight
    42 g
    1.5 oz
Dimensions
    3.0 cm (1.19 in.) maximum diameter, 11.4 cm (4.5 in.) length; mounting hole 6.3 mm (0.25 inches) diameter
Wetted materials
    Polypropylene case, EPDM® o-rings, stainless steel retaining ring
Buoyancy (fresh water)
    +13 g (0.5 oz.) in fresh water at 25°C (77°F); +17 g (0.6 oz.) with optional boot
Waterproof
    To 120 m
    400 ft.
Shock/drop
    1.5 m (5 ft.) drop at 0°C to 70°C (32°F to 150°F)
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.
Launch modes
    Immediate start and delayed start
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.
NIST certificate available
    for additional charge
Environmental Rating
    IP68

†IMPORTANT
    The plastic case will become brittle at temperatures lower than -20°C. If the logger is deployed in a location where the temperature drops below -20°C, make sure the logger remains stationary and is not pulled on or struck. Return the logger to above -20°C before handling.