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TidbiT v2 Water Temperature Data Logger


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 desi..

  • Brands Onset
  • Product Code: UTBI-001
  • Availability: 7-10 Days

Tags: water, temperature, tiny, 300m, UTBI-001

Water Temperature TidbiT v2 Data Logger

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 Temperature


For more information visit Onset

  • TidbiT v2 (UTBI-001) Temperature Data Logger


Product Datasheets

Product Operational Documents

Product Software/App Documents

UTBI-001 Datasheet

HOBO® TidbiT® Temp Data Logger (UTBI-001) Quick Start

TidbiT® v2 Temp Logger Data Sheet

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



To ensure that your Data logger meets CFR Part 21 Compliance, the HOBOware PRO v.3.x software is required.


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.


White Papers

On-Demand Webinars

How-To Videos

Informational Pages


Application Stories

Tech Notes

Forum Postings

Robust, low-cost data loggers for stream temperature, flow intermittency, and relative conductivity monitoring Data Logger Basics HOBOware Menus Explained Part 1 Tips on Buying a Data Logger In-Transit Temperature Monitoring of Capitol Christmas Treen-Transit Temperature Monitoring of Capitol Christmas Tree Wildlife Visitation to Compost Experiment Deploying a logger in a culvert pipe Suspending & orienting temp/light pendant UA-002 underwater?
  Groundwater Monitoring with HOBO Data Loggers HOBOware Menus Explained Part 2 What is a Data Logger? National Grid's Deep Energy Retrofit Pilot Program Water Temperature Loggers Survive Airport Bomb Blast Deploying water temp and water level loggers or developing a QAPP Data logger not measuring light intensity
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    Launch Basics in HOBOware   Water Temperature Monitoring in Buzzards Bay Watershed Study Shows Warming Trend in Alaskan Streams How often do temperature data loggers need recalibration and/or servicing?  
    Installing HOBOware and Managing License Keys     Scientists Study Coral Health in Seychelles Islands Pendant Optics  
    How to navigate the HOBOware plot screen     Monitoring Environmental Impact off Qatar’s Coastal Waters Proper Coupler Seating, BASE-U-4 (Optic Base station) and the U-DTW-1 (Waterproof Shuttle)  
    How to inspect and lubricate the O-ring on your HOBO Pendant data logger     HOBO Compact Data Loggers Support Coral Reef Health in Micronesia The effects of electroshock fishing on underwater loggers  
    Visit Onset's YouTube Channel     Data Loggers Monitor Lakes for Signs of Global Warming Waterproof shuttle for beginners  




* 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.
Launch Modes Immediate start, delayed start
Logger Battery Life 5 years with 1 minute or greater logging interval
Logger Battery Type 3 Volt lithium, non-replaceable
Logger CE The CE Marking identifies this product as complying with the relevant directives in the European Union (EU).
Logger 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
Logger Environmental Rating IP68
Logger Memory 64K bytes memory (approx. 42,000 12-bit temperature measurements)
Logger Real-time Clock At ± 1 minute per month 0° to 50°C (32° to 122°F)
Logger Waterproofing To 305 m (1000 ft.)
Logger Weight 19.6 g (0.69 oz)
Logger Wetted Materials Epoxy case
Logging Rate 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.
NIST Certificate Available for additional charge
Temperature Sensor
Temperature Sensor Accuracy ±0.21°C from 0° to 50°C (±0.38°F from 32° to 122°F)
Temperature Sensor Drift 0.1°C (0.18°F) per year
Temperature Sensor Operating Range -20° to 70°C (-4° to 158°F) in air; maximum sustained temperature of 30°C (86°F) in water*
Temperature Sensor Resolution 0.02°C at 25°C (0.04°F at 77°F)
Temperature Sensor 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%)