Used Onset HoBo® U12-015 temperature data logger

Used Onset HoBo® U12-015 temperature data logger

Used Onset HoBo® U12-015 temperature data logger


The HOBO U12 Stainless Temperature Data Logger is a single-channel temperature logger with 12-bit resolution that can record up to 43,000 measurements. The logger uses a direct USB interface for launching and data readout by a computer or HOBO shuttle.


Technical Overview

Measurement Range -40° to 125°C (-40° to 257°F)
Accuracy ±0.25°C from 0° to 50°C (±0.45°F from 32° to 122°F
Resolution 0.03°C at 25°C (0.05°F at 77°F)
Drift 0.05°C/year + 0.1°C/1000 hrs above 100°C
Response Time in 1 m/s  (2.2 mph) airflow <10 minutes, typical to 90%
Response Time in Water <3.5 minutes, typical to 90%
Time Accuracy ±2 minute per month at 25°C (77°F), see Plot B
Operating Environment Air, water, steam, 0 to 100% RH
Operating Temperature Logging: -40° to 125°C (-40° to 257°F)

Launch/readout: 0° to 50°C (32° to 122°F), per USB specification

Battery Life 3 year typical use, factory replaceable
Memory 64K bytes (43,000 12-bit measurements)
Construction 316 series stainless steel, EPDM or Viton O-ring; see Food-Grade

Compliance section for additional details

Weight 72 g (2.5 oz)
Logger Dimensions 17.5 x 101.6 mm (0.69 x 4.00 inches)
Pressure/Depth Rating 2200 psi (1500 m/4900 ft) maximum
Vibration Rating) Navy spec: NAVMAT P-9492
SANAS Certificate Available for additional charge; temperature range -30° to 120°C  (-22° to 248°F

Food-Grade Compliance

The logger components meet US Food and Drug Administration (FDA) guidelines as follows:

  • Logger case: 316 series stainless steel is GRAS by the FDA and meets NSF 51 & 61 requirements.
  • EPDM O-ring: Meets FDA 21 CFR 175.2600
  • Lubricant (applied to O-ring): Meets FDA 21 CFR 175.300 and NSF 51 & 61 requirements


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