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Temperature-Humidity Data Logger with 2 Universal External Inputs
TRODEKS Engineering | Thermocouples, Pressure Transducers, Flow Meters, PID Controllers
  • Integral Temperature/Humidity Sensors
  • • OMYL-M90 has Internal Temperature/Humidity Sensors
  • • OMYL-M90E Fitted with Integral Temperature/Humidity Probe
  • 2 External Inputs for:
  • • Combined Temperature/Humidity Sensors
  • • Pt100/Pt1000 RTD, Thermistor Temperature Sensors
  • • Process Voltage or Current Input
  • • Pulse Input
  • Up to 4 Million Readings (Internal Memory Size)
  • Up to 32 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
 Manuals (contact with email : [email protected])


The OMYL-M90 and OMYL-M90E are temperature/humidity data loggers that also accept two universalexternal inputs and are software configurable to recordup to 6 parameters. These data loggers are availablewith standard memory of 100,000 readings (OMYL-M90,OMYL-M90E) or expanded memory of 4 million readings(OMYL-M90-4M, OMYL-M90E-4M). The following inputscan be configured:• Temperature and humidity (internal sensors forOMYL-M90, integral temperature/humidity probe forOMYL-M90E)• External temperature (Pt100/Pt1000 RTD, U thermistor)• External temperature/humidity (for combined externaltemperature/humidity probes)• Process voltage or current (0 to 10 mV, 0 to 20 mV,0 to 50 mV, 0 to 100 mV, 0 to 1 V, 0 to 2.5 V, 0 to 5 V,0 to 10 V, 0 to 24 mA)• Pulse or frequency input, e.g., from revolution counters,rain gages, photoelectric sensorsFor pulse input once activated the data logger sensesand records the number of pulses/contact closures thatoccur within adjacent “time bin” periods. The bin period isselectable from 1 second to over 24 hours. At the end ofeach bin period, the total number of pulses/counts withinthe bin period is recorded. The data logger then startsanother bin period and continues until either the memoryis full or the test period has ended.The storage medium is non-volatile flash memory sono data is lost if the battery becomes discharged. Datalogger setup as well as data retrieval is accomplishedusing the included standard OMYL-SOFT software.Downloaded data is stored in the OMYL-SOFTsoftware as a text file for viewing in third party softwarepackages or Microsoft Excel. The OMYL-SOFTstandard software does not include any graphingfunctionality. Graphing and analyzing downloaded datafiles requires the OMYL-SOFT-PLUS version of thesoftware (ordered separately).

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)
External Temperature Input
    Sensor: Pt100 or Pt1000 RTD, U thermistor (2000 Ω @ 25°C)
    Range: -70 to 250°C (-94 to 482°F), probe dependent
    Resolution: 0.01°C (0.02°F)
Internal/External Humidity
    Humidity Range: 0 to 100% RH
    Humidity Resolution: 0.01% RH
Current Input
    Range: 0 to 24 mA
    Resolution: 0.36 µA
    Input Impedance: 10 Ω shunt
    Accuracy: 0.1% of range
    Signal Input: OMYL-CI cable
Pulse Input
    Signal Input: Potential-free (dry contact) signals and low level pulses < 3 Vdc can be measured with the OMYL-CS input cable; higher voltage level pulses up to 24 Vdc can be measured with the optional OMYL-CP input cable
    Maximum Input Voltage: 24 Vdc
Measuring Range
    Potential Free (Dry Contact) Pulses
        Pulse Count: 0 to 65,000 pulses
        Pulse Rate: 0 to 100 Hz
    Voltage Pulses
        Pulse Count: 0 to 65,000 pulses
        Pulse Rate: 0 to 1300 Hz
Reading Rate: 1 second to 24 hours; 2 Hz, 4 Hz, 8 Hz, 16 Hz, 32 Hz in fast mode (only 4 Hz for humidity sensors)
Start Modes: Immediate start, delayed start
Memory Capacity: OMYL-M90, OMYL-M90E; 100,000 readings: OMYL-M90-4M, OMYL-M90E-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 (included); -40 to 90°C (-40 to 194°F) with optional high temperature lithium battery
    OMYL-M90, OMYL-M90-4M: 30 H x 50 mm dia (1.18 x 1.97")
    OMYL-M90E, OMYL-M90E-4M: 30 H x 50 mm dia (1.18 x 1.97")with 100 L x 8 mm dia probe
Weight: 70 g (2.5 oz)
Enclosure: Robust, shock-proof POM, IP65
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