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Portable Temperature/Humidity Data Loggers with USB Interface

$81.86

Item# OM-141

Volume discounts available
Volume Discount Schedule
Quantity Price each
1-4 $81.86
5-9 $77.77
10-24 $76.13
25-49 $72.86
50-99 $71.22
100+ $69.58

In stock

Lead Time (If not in stock): 7 weeks
Portable Temperature/Humidity Data Loggers with USB Interface OM-141 OM-141
  • One Button Starts/Stops Data Logging Without a PC
  • Plug-and-Play USB 2.0 Interface No Need for Cables, Cradles or Docks
  • Large Storage Capacity: 16,000 Pairs of Temperature and Humidity Readings
  • 3½-Digit LCD Displays Real-Time Temperature and RH Readings, Device Working Status and “Memory Full” (OM-143 and OM-144 Only)
  • Built-In Infrared Thermometer for Checking Temperature of Vents and Surfaces (OM-144 Only)
  • Sampling Time and Hi/Lo Temperature and RH Alarm Setpoints are Selectable Using Included Software
  • Software Also Calculates Dew Point and Wet Bulb Temperatures, and Mixing Ratio as GPP (Grains per Pound) or GPK (Grams per Kilogram)
  • One-Click Exporting of Logged Data to Excel® or Word
  • Long Battery Life (Up to One Year)

OM-141 Model Options

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Measurement Type
Number of Measurements
Display
Input Type
Maximum Samples
Power
Data Interface
Max Sampling Rate


The OM-140 Series are low-cost, compact, battery powered temperature/humidity data loggers capable of unattended logging (recording) of the ambient temperature and relative humidity (RH) of an environment for days, weeks or months. The OM-144 data logger can also measure and optionally log surface temperatures spot-checked by a technician using the unit’s integral infrared (IR) thermometer. In addition, these units can also calculate and display absolute humidity levels in units of grains per pound (GPP) or g/kg. Also called mixing ratio, GPP is a more useful moisture metric than RH to water damage restorers. Using RH alone, a restorer might unknowingly introduce moist air—with a low RH but a high GPP—during a job’s drying phase.

Data logging can be started or stopped by pushing a button on the unit, eliminating the need to bring a laptop to the job site. After a data log has been captured and stored, it can be uploaded as a .txt file to any PC running the Windows® XP/7 or 8 operating system after plugging the data logger into one of the computer’s USB ports. The data logger’s internal flash memory is large enough to store 16,300 pairs of temperature and RH readings or for the model OM-144 nearly 10,000 sets of RH, ambient temperature and surface temperature readings. Included with the product is a mini-disc with the drivers needed to interface the unit to the computer, as well as software that can display a data log file as a table or graph and/or export it to Microsoft Excel. Exporting to Excel is recommended for sophisticated trending and analysis of humidity and temperature data and easy detection of unexpected excursions.
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