The OMYL-RH25 is a temperature/humidity data
logger that also accepts two external temperature
or temperature/humidity inputs. This data logger is
available with standard memory of 100,000 readings
(OMYL-RH25) or expanded memory of 4 million
readings (OMYL-RH25-4M). The following inputs can
• Internal temperature and humidity sensors
• External temperature (Pt100/Pt1000 RTD, Type U thermistor)
• External temperature/humidity (for combined
external temperature/humidity probes)
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).
SPECIFICATIONS Internal Temperature Temperature Range: -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 Temperature Resolution: 0.01°C (0.02°F) Accuracy: See chart on PDF External Temperature Input Sensor: Pt100 or Pt1000 RTD, U thermistor (2000Ω @ 25°C) Range: -70 to 250°C (-94 to 482°F) Resolution: 0.01°C (0.02°F) Accuracy: See chart on PDF Internal/External Humidity Humidity Range: 0 to 100% RH Humidity Resolution: 0.01% RH Accuracy: See chart on PDF Reading Rate: 1 second to 24 hours; 2 Hz, 4 Hz in fast mode Start Modes: Immediate start, delayed start Memory Capacity OMYL-RH25: 100,000 readings OMYL-RH25-4M: 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 Dimensions: 30 H x 50 mm dia (1.18 x 1.97") Weight: 70 g (2.5 oz) Enclosure: Robust, shock-proof POM, IP65
† All amounts shown in USD Note: Comes complete with 3V lithium battery (standard temperature range), 1.8 m (6') USB interface cable, OMYL-SOFT software and operator’s
manual on USB stick. Ordering Example: (1) OMYL-RH25-4M Temperature/humidity data logger (internal temperature/humidity sensors) with 2 external inputs, 4 million readings, $590.00