TidbiT v2 Water Temperature Data Logger

Part # UTBI-001
Max Depth 1,000 ft
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HOBO data loggers requires HOBOware software (USB interface cable included w/CD purchase) and a communications device. HOBOware Pro is required when using the U-DTW-1 Waterproof shuttle. See compatible items below.


Optical Interface for data transferOnly 3x4 cm, this tiny data logger measures temperatures over a wide temperature range. The TidbiT v2 provides 12-bit resolution and has ±0.2 °C accuracy. It is designed for outdoor and underwater environments and is waterproof to 300 m (1000 ft). An optical USB interface allows users to offload data in seconds. Please note, a solar radiation shield is required to obtain accurate air temperature measurements in sunlight (RS1 Solar Radiation Shield, assembly required; or M-RSA pre-assembled Solar Radiation Shield).

Highlighted Features

  • Onset's smallest temperature data logger
  • Waterproof to 300 meters (1,000 feet)
  • Data readout in less than 30 seconds via fast Optic USB interface

In what environment does this data logger operate?

This data logger operates in outdoor and underwater environments.

What measurements does this data logger support?

The UTBI-001 data logger supports the following measurements: Temperature and Water Temp

To see the full specifications for this product, please see our product manual found under the documentation tab if available.

Temperature Sensor
Operation range:*
-20° to 70°C (-4° to 158°F) in air;
maximum sustained temperature of 30°C (86°F) in water*

Accuracy: 0.2°C over 0° to 50°C (0.36°F over 32° to 122°F)

Resolution: 0.02°C at 25°C (0.04°F at 77°F)

Response time: 5 minutes in water; 12 minutes in air moving 2 m/sec; 20 minutes in air moving 1 m/sec (typical to 90%)

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: 3 Volt lithium, non-replaceable

Battery life (typical use): 5 years with 1 minute or greater logging interval

Memory (non-volatile): 64K bytes memory (approx. 42,000 12-bit temperature measurements)

Weight: 19.6 g (0.69 oz)

Dimensions: 3.0 × 4.1 × 1.7 cm (1.2 × 1.6 × 0.68 in.); mounting bail 4.6 mm (3/16 in.) diameter hole

Wetted materials: Epoxy case

Waterproof: To 305 m (1000 ft.)

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, delayed start

Offload modes: Offload while logging; stop and offload

Battery indication: Battery level can be viewed in status screen and optionally logged in datafile. Low battery indication in datafile.

NIST certificate: Available for additional charge

The CE Marking identifies this product as complying with the relevant directives in the European Union (EU).

* To guarantee accuracy, the TidbiT v2 Temp must not be used in condensing environments and water temperatures higher than 30C (86F) for more
than eight cumulative weeks over the life of the logger. Frequent or prolonged exposure will lead to measurement drift and eventual failure.

Graphing and Analysis
HOBOware Pro Mac/Win (USB cable included)
HOBOware Pro - Mac/Win (Download Only)
Data Offload - Base Stations - Shuttles
Optic USB Base Station
HOBO® Waterproof Shuttle
Carrying Case
Pelican Case
Compliance Certificate
Covers, Tips, Feet, Boots
TidbiT Boot Black
TidbiT Boot White
Data Offload Couplers
Replacement Coupler for TidbiT v2
NIST Certification
Setup Charge for NIST Traceable
NIST Temperature point
Documentation for the UTBI-001

TidbiT-v2-Temp-Logger logo
TidbiT® v2 Temp Logger Data Sheet

TidbiT v2 Temp (UTBI-001) User's Manual

The following are associated resources for this product. In general users of this product can gain insight into its possible use by utilizing the resources below.

On-demand Webinars & Videos