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Product Groups
Portable Temperature and Humidity Data Loggers
TRODEKS Engineering | Thermocouples, Pressure Transducers, Flow Meters, PID Controllers
  • Models for Temperature (OM-91) and Temperature/Humidity (OM-92)
  • Immediate, Delayed (Specific Date/Time) or Pushbutton Start
  • Real-Time Mode
  • User-Configurable High and Low Alarms
  • LED Status Indicators
  • USB Interface for Fast Data Transfer
  • Compact, Light Weight, Easy-to-Use
  • Long Battery Life
 Manuals (contact with email : [email protected])


The OM-90 Series are portable, battery operated,temperature (OM-91) and temperature/humidity(OM-92) data loggers. The OM-90 Series data loggersoffer accurate and repeatable logging for temperatureand relative humidity. Temperature is measured to anaccuracy of ±0.3°C over the range of 5 to 60°C(41 to 140°F) and ±2.0°C over the full range of-30 to 80°C (-22 to 176°F). Relative humidity ismeasured to an accuracy of ±3.0% RH over the20 to 80% RH range and ±5.0% RH over the0 to 100% RH range. Both temperature and relativehumidity are logged at a user configurable logging ratewhich is software selectable.

These data loggers are ideal for transportationapplications where it is necessary to document thatthe material in-transit has stayed within particularenvironmental limits. High/low alarm limits can be setabove or below which LED indicators will be activatedso that the user can become aware that the desiredtransportation conditions have been exceeded.

Each data logger can be assigned a 16 charactername. This can be helpful in applications wheremultiple data loggers are used and there is a needto distinguish between them (for example based onlocation).

The data logger includes a very easy to use softwareapplication. The application is used for configuration ofthe logger, extraction of logger data, graphically viewingdata, spread sheet analysis of data and saving datato file (typically in comma separated value CSV fileformat) for third party applications such as MicrosoftExcel. The graphical user interface is completelyintuitive in terms of configuring new devices andextracting data from a field device. When the user hasmultiple devices requiring the same setup then a loggersetup from a saved configuration file can be preloadedinto the application to help expedite the process andensure all loggers get setup identically. The applicationdoes not require any driver installations to connect tothe data logger. Just install the software, run it and thenconnect the data logger.

    Range: -30 to 80°C (-22 to 176°F)
    Resolution: 0.01°C
    Accuracy: ±0.3°C from 5 to 60°C (41 to 140°F)
    Calibration Accuracy @ 25°C ±20°C: ±0.1°C
Humidity (OM-92 Only)
    Range: 0 to 100% RH
    Resolution: 0.01% RH
    Accuracy: ±3% over 20 to 80% RH range; ±5% RH below 20% RH or above 80% RH
    Calibration Accuracy @ 25% RH: ±1.8% RH @ 25% RH
    OM-91: 65,520 temperature measurements
    OM-92: 65,520 temperature and 65,520 humidity measurements
Start Modes: Immediate start on disconnect from PC, delayed start (scheduled date/time) or pushbutton start
Recording Mode: Stop on memory full; when data logger operation is start/stopped by user intervention via button press, last memory location is retained
Recording Interval: 1 sec, 10 sec, 30 sec, 1 min, 10 min, 30 min, 1 hr (software selectable)
Software Compatibility: Windows XP/Vista/7 and 8 (32-bit and 64-bit)
Real Time Logging: Displays real time data when connected to a PC
Real Time Clock: Time automatically synced to PC
Battery Backup: Continues to keep time when off
Accuracy: 0.50 sec/day (~3 min/year)
Alarms: High and Low alarms for temperature and humidity; dedicated alarm LED indicator
LED Indicators: Alarm and status LEDs
Device ID: Each data logger can have a 16 character name assigned
Connections: 0.9 m (3') USB Micro-B to PC cable (included)
Power: 3V lithium CR2450 battery included (user replaceable)
Battery Life: Over 4 year battery life while logging
Bypass Mode: Unit is powered from USB when connected to conserve the battery
Dimensions: 53 H x 33 W x 15 mm D (1.38 x 2.36 x 0.6")
Weight: 25 g (0.9 oz)
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