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Temperature, Humidity and Barometric Pressure Data Loggers


Item# OMYL-RH23E

Volume discounts available
Volume Discount Schedule
Quantity Price each
1-4 C$818.48
5-9 C$777.56
10-24 C$761.19
25-49 C$728.45
50-99 C$712.08
100+ C$695.71

In stock

Limited Stock
Temperature, Humidity and Barometric Pressure Data Loggers OMYL-RH23E OMYL-RH23E
  • This product line has been discontinued. For an alternate product, please see our wide selection of temperature and humidity loggers here. For pressure dataloggers, please see our selction here.

  • Integral Temperature/Humidity/Pressure Sensors
  • OMYL-RH23 Has Internal Temperature/Humidity/Pressure Sensors
  • OMYL-RH23E Has Internal Pressure Sensor with Temperature/Humidity Sensors Fitted in Integral Probe
  • Up to 4 Million Readings (Internal Memory Size)
  • Up to 4 Hz Sampling Rate
  • High Accuracy
  • 20 Bit A/D Converter
  • Shock Proof IP65 Housing (Dust and Water Jet Proof)
  • Transfer Rate of 500 kbps
  • Low Current Consumption
  • Up to 4 Years Battery Life

OMYL-RH23E Model Options

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Measurement Type
Number of Measurements
Input Type
Maximum Samples
Data Interface
Max Sampling Rate
Additional Feature

The OMYL-RH23 and OMYL-RH23E are robust devices capable of logging temperature, humidity and barometric pressure readings and are software configurable to record either all three of these parameters or just individual variables. These data loggers are available with standard memory of 100,000 readings (OMYL-RH23, OMYL-RH23E) or expanded memory of 4 million readings (OMYL-RH23-4M, OMYL-RH23E-4M). The OMYL-RH23/OMYL-RH23-4M have built-in sensors for temperature, humidity and barometric pressure. The OMYL-RH23E/OMYL-RH23E-4M have an internal pressure sensor with the temperature/ humidity sensors fitted in an integral 100 mm (3.94') steel probe. These data loggers are suited for a variety of applications including environmental or climate studies, meteorological research and also in clean rooms and laboratories.

The storage medium is non-volatile flash memory so no data is lost if the battery becomes discharged. Data logger setup as well as data retrieval is accomplished using the included standard OMYL-SOFT software. Downloaded data is stored in the OMYL-SOFT software as a text file for viewing in third party software packages or Microsoft Excel. The OMYL-SOFT standard software does not include any graphing functionality. Graphing and analyzing downloaded data files requires the OMYL-SOFT-PLUS version of the software (sold separately).

Sensor Type
    OMYL-RH23/OMYL-RH23-4M: Internal temperature, humidity and pressure sensors
    OMYL-RH23E/OMYL-RH23E-4M: Internal pressure sensor with temperature and humidity sensors fitted in integral probe
Temperature Range: -30 to 70°C (-22 to 158°F) with standard lithium battery (included); -40 to 90°C (-40 to 194°F) with optional high temperature lithium battery
Resolution: 0.01°C (0.02°F)
Accuracy: See chart on PDF
    Range: 0 to 100 %RH
    Resolution: 0.01 %RH
    Accuracy See chart on PDF
Barometric Pressure
    Range: 10 to 1100 hPa
    Resolution: 0.1 hPa
    Absolute Accuracy @25°C: ±1.5 hPa
    Relative Accuracy @25°C: ±0.5 hPa
Reading Rate: 1 second to 24 hours; 2 Hz, 4 Hz in fast mode
Start Modes: Immediate start, delayed start
Memory Capacity
    OMYL-RH23, OMYL-RH23E: 100,000 readings
    OMYL-RH23-4M, OMYL-RH23E-4M: 4 million readings
Memory Wrap Around: Yes (software configurable)
Battery: 3V lithium battery [standard temperature range battery (included) optional high temperature range battery]; user replaceable
Battery Life (Standard Temperature Range Battery): 4 years at 1 minute reading rate, 230 days at 10 second reading rate, 25 days at 1 second reading rate
LED Functionality: Integrated status LED indicates data logging status, low battery or alarm condition
Alarms: Software programmable high/low thresholds
Computer Interface: USB (interface cable included)
Software: XP SP3/Vista/7 and 8 (32- and 64-bit)
Operating Environment: -30 to 70°C (-22 to 158°F) with standard lithium battery; -40 to 90°C (-40 to 194°F) with optional high temperature lithium battery
    OMYL-RH23, OMYL-RH23-4M: 30 H x 50 dia mm (1.18 x 1.97')
    OMYL-RH23E, OMYL-RH23E-4M: 30 H x 50 dia mm (1.18 x 1.97') with 100 L x 8 dia mm probe (3.94 x 0.31')
Weight: 70 g (2.5 oz)
Enclosure: Robust, shock-proof POM, IP65
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