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Item # mV-HR, TruTrack Data Logger

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The mV-HR is a small, high resolution (16-bit) voltage data logger, provided with an internal temperature sensor. The unit can accommodate inputs of:

  • ±50 mV
  • ±100 mV
  • ±200 mV
  • ±400 mV
Models designed for other voltage ranges, 4-20 mA input, and self-contained loggers for a host of environmental parameters (including temperature, humidity, and pH) are also available.

Supplied with easy to use yet feature-rich software, the loggers can be programmed to record in engineering units, and yield a number of useful reports. Logging files can be exported to spreadsheet programs, for further analysis.


Working and Storage Temperatures

-22°F to 158°F (-30°C to 70°C)

Storage capacity

Logging one channel: 522,240 samples     Logging two channels (storing temperature data): 261,120 samples


Custom 7.2V lithium battery pack

Download time

9.5 minutes at full capacity

Battery life

One to five years, depending on usage.   Data retained if battery fails; battery status monitored in software

Case material

Type 304 Stainless tube

Screw on end cap

Plated brass


22 lb    (10.0 kg)
4.5 lb    (2.0 kg)

5.3 oz (149 g)


The logger is a cylindrical tube

Resolution (by millivolt input)

0.01 mV for all ranges except ±400mV. ±400mV is 0.1 mV


7" H x 4" W x 8.875" D   (178 x 102 x 225 mm)
0.79 in diameter x 7.28 L  [20mm dia. x 185mm L]

Sampling Rate

Adjustable in one second increments from 1 sample/second to 1 sample/10 hours

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