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Portable Low Cost Data Loggers Part of the NOMAD Family

OM-40 Series   
1 year warranty
 
Portable Low Cost Data Loggers Part of the NOMAD Family
OM-40 Series:Portable Low Cost Data Loggers Part of the NOMAD Family
Click for larger image.
   
Measure and Record Temperature, Relative Humidity, DC Voltage or DC Current Input
Stores up to 7943 Readings
Compact Size
East-to-Use Windows Software
Models Available For
  • Temperature Input(With Internal and External Sensor)
  • Humidity
  • 4-20 mA Input
  • 0-2.5 vdc Input
  • Click to scroll below to order See Specs PDF View a printer friendly page

    These products are being discontinued. Please see OM-70_Series and
    OM-EL-USB-1 for possible alternatives.

    OM-40 Series dataloggers can record temperature, relative humidity, 4 to 20 mA and 0 to 2.5 Vdc signals.

    Model OM-41 measures temperature only (internal temperature sensor).

    Model OM-42 is a two channel datalogger that measures temperature (internal sensor) and also one external signal which can be an external temperature probe, 4 to 20 mA signal or 0 to 2.5 Vdc signal.

    Model OM-43 measures temperature and relative humidity (internal sensors).

    Model OM-44 is a four channel datalogger that measures temperature and relative humidity (internal sensors) and also up to two external signals which can be external temperature probes, 4 to 20 mA signals or 0 to 2.5 Vdc signals. The internal temperature sensor is on a 4-inch wire which is mounted on the circuit board inside the snap lid of the datalogger case. Typically this sensor is left inside the case and measures ambient air temperature over the operating temperature range of the logger -20 to 70C (-4 to 158F). The internal temperature sensor can also be placed outside of the case, for faster response time. When the sensor is placed outside of the case it is capable of measuring temperatures from -40 to 120C (-40 to 248F).


    MEASUREMENT SPECIFICATIONS
    Temperature (internal sensor) - All Models
    Measurement Range: sensor inside case, -20 to 70C (-4 to 158F); sensor outside case, -40 to 120C (-40 to 248F)
    Sensor Type: thermistor
    Accuracy: +0.7C@21C (+1.27F @ 70F) , see plot in detailed specs(PDF)
    Resolution: 0.4C (0.7F) at 70F
    Response Time (Still Air): 15 min typical with sensor inside case; 1 min typical with sensor outside case

    Relative Humidity
    Models OM-43 and OM-44
    Measurement Range: 25% to 95% RH at 80F for intervals of 10 seconds or greater, noncondensing and non-fogging, see plot in detailed specs(PDF)
    Accuracy: 5% 5 to 50C (41 to 122F)
    Resolution: 0.4% 5 to 50C (41 to 122F)
    Response Time: 10 min typical in air

    External Temperature Sensors (for use with Models OM-42 and OM-44)
    Measurement Range:
    OM-40-C-LT: 0 to 44C (32 to 110F); Not recommended for wet or moist environments.
    OM-40-C-HT-B: -40 to 50C in water or moist soil; -40 to100C(-40 to 212F) in air
    Sensor Type: thermistor
    Input Connection: 2.5 mm stereo phone jack

    External 4 to 20 mA Input (for use with Models OM-42 and OM-44)
    Measurement Range: 0 to 20.1 mA
    Input Connection:
    2.5 mm stereo phone jack Accuracy: 0.1 mA 1% rdg
    Resolution: 0.4% of fs
      
    External 0 to 2.5 Vdc Input (for use with Models OM-42 and OM-44)
    Measurement Range: 0 to 2.5 Vdc
    Input Connection: 2.5 mm stereo phone jack; external input ground, input, switched 2.5 V output; external input ground connection is not the same as PC interface connection ground and should not be connected to any external ground
    Input Impedance: 10 kOhm
    Accuracy: 10 mV 1% rdg
    Resolution: 10 mV (8-bit)
    Output Power: 2.5 Vdc at 2 mA, active only during measurements

    GENERAL SPECIFICATIONS
    Measurement Capacity: 7943 readings
    Measurement Interval: user selectable from 0.5 sec to 9 hrs
    Memory Modes: stop when wrap-around when full (user selectable)
    Memory: non-volatile EEPROM memory retains data even if battery fails
    Operation: blinking LED light confirms operation
    Time Accuracy: 1 minute week at 20C (68F)
    Operating Temperature: -20 to 70C (-4 to 158F)
    Operating Humidity: 0 to 95% non-condensing
    Storage Temperature: -20 to 70C (-4 to 158F)
    Power: 3.0 V lithium battery
    Battery Life: 1 year
    Dimensions: 68 H x 48 W x 19 mm D (2.4 x 1.9 x 0.8")
    Weight: 29 g (1 oz)


    To Order (Specify Model Number)    
    expand list What Other People Bought: When you see this icon, click on it to expand a list of products that other people have bought when they purchased this model.
     Part Number   Availability   Price   Description    Qty.
    Click to expand/minimize a list of what others bought with the OM-41  OM-41    Consult sales   Temperature datalogger  
    Click to expand/minimize a list of what others bought with the OM-42  OM-42    Consult sales   Temperature/external input datalogger (takes one external input)  
    Click to expand/minimize a list of what others bought with the OM-43  OM-43    Consult sales   Temperature/relative humidity datalogger  
    Click to expand/minimize a list of what others bought with the OM-44  OM-44    Consult sales   Temperature/relative humidity/external input datalogger (takes up to two external inputs)  
     Accessories
    Click to expand/minimize a list of what others bought with the OM-40-C-LT  OM-40-C-LT    Consult sales   External temperature sensor for use with Models OM-42 and OM-44, 0 to 44C(32 to 110F) temperature range. Not for use in wet or moist environments. Includes 6 ft. cable  
    Click to expand/minimize a list of what others bought with the OM-40-C-HT-B  OM-40-C-HT-B In Stock   $43.00    External temperature sensor for use with Models OM-42 and OM-44. Temperature range: -40 to 50C(-40 to 122F) in water or moist soil, -40 to 100C(-40 to 212F) in air. Includes 6 ft. cable.  
    Click to expand/minimize a list of what others bought with the OM-40-C-V  OM-40-C-V    Consult sales   External 0 to 2.5 Vdc voltage input cable for use with Models OM-42 and OM-44  
    Click to expand/minimize a list of what others bought with the OM-40-C-I  OM-40-C-I In Stock   $21.00    External 4 to 20 mA input cable for use with Models OM-42 and OM-44  
    Click to expand/minimize a list of what others bought with the RD-TEMP-SW-A  RD-TEMP-SW-A    Consult sales   Windows 95/98/2000/XP software and RS-232 interface cable with DB9F termination for OM-40 Series dataloggers  
    Click to expand/minimize a list of what others bought with the OM-40-HUM  OM-40-HUM    Consult sales   Replacement humidity sensor for Models OM-43 and OM-44  
    Click to expand/minimize a list of what others bought with the OM-40-BATT-6  OM-40-BATT-6 2 Weeks   $20.00    Replacement 3.0V lithium battery for OM-40 Series dataloggers (package of 6)  
    All dollar amounts on this site are shown in US currency.

     Note: Dataloggers are supplied with complete operator's manual and mounting kit (hook/loop, magnet and tape).

       
    Keywords:Portable Low Cost DataloggersPart of the NOMAD Family, differential gauge pressure temperature recorder strain gauge pressure sensor usb dataloggers

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