Cart  |  Contact  |  Help  | 
1-888-826-6342  | 
US and Canada1-888-826-6342
International1-203-359-1660

Your One-Stop Source for Process Measurement & Control!

Portable Low Cost Data Loggers Part of the NOMAD® Family

OM-40 Series

OM-40 Series:Portable Low Cost Data Loggers Part of the NOMAD® Family

Portable Low Cost Data Loggers Part of the NOMAD® Family

See All Models Below

1 year warranty
  • 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

Description

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 70°C (-4 to 158°F). 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 120°C (-40 to 248°F).


MEASUREMENT SPECIFICATIONS
Temperature (internal sensor) - All Models
Measurement Range: sensor inside case, -20 to 70°C (-4 to 158°F); sensor outside case, -40 to 120°C (-40 to 248°F)
Sensor Type: thermistor
Accuracy: +0.7°C@21°C (+1.27°F @ 70°F) , see plot in detailed specs(PDF)
Resolution: 0.4°C (0.7°F) at 70°F
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 80°F for intervals of 10 seconds or greater, noncondensing and non-fogging, see plot in detailed specs(PDF)
Accuracy: ±5% 5 to 50°C (41 to 122°F)
Resolution: 0.4% 5 to 50°C (41 to 122°F)
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 44°C (32 to 110°F); Not recommended for wet or moist environments.
OM-40-C-HT-B: -40 to 50°C in water or moist soil; -40 to100°C(-40 to 212°F) 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 20°C (68°F)
Operating Temperature: -20 to 70°C (-4 to 158°F)
Operating Humidity: 0 to 95% non-condensing
Storage Temperature: -20 to 70°C (-4 to 158°F)
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)
Place Order(Specify Model Number)

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/Desc.
Availability
Price
Description
Qty
Click to expand/minimize a list of what others bought with theOM-41
OM-41
Star
Availability:  
Consult Sales  
Temperature datalogger
 
 
Click to expand/minimize a list of what others bought with theOM-42
OM-42
Star
Availability:  
Consult Sales  
Temperature/external input datalogger (takes one external input)
 
 
Click to expand/minimize a list of what others bought with theOM-43
OM-43
Star
Availability:  
Consult Sales  
Temperature/relative humidity datalogger
 
 
Click to expand/minimize a list of what others bought with theOM-44
OM-44
Star
Availability:  
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 theOM-40-C-LT
OM-40-C-LT
Star
Availability:  
Consult Sales  
External temperature sensor for use with Models OM-42 and OM-44, 0 to 44°C(32 to 110°F) 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 theOM-40-C-HT-B
OM-40-C-HT-B
Star
Availability: In Stock  
$43.00   
External temperature sensor for use with Models OM-42 and OM-44. Temperature range: -40 to 50°C(-40 to 122°F) in water or moist soil, -40 to 100°C(-40 to 212°F) in air. Includes 6 ft. cable.
 
Click to expand/minimize a list of what others bought with theOM-40-C-V
OM-40-C-V
Star
Availability:  
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 theOM-40-C-I
OM-40-C-I
Star
Availability: 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 theRD-TEMP-SW-A
RD-TEMP-SW-A
Star
Availability:  
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 theOM-40-HUM
OM-40-HUM
Star
Availability:  
Consult Sales  
Replacement humidity sensor for Models OM-43 and OM-44
 
 
Click to expand/minimize a list of what others bought with theOM-40-BATT-6
OM-40-BATT-6
Star
Availability: In Stock  
$20.00   
Replacement 3.0V lithium battery for OM-40 Series dataloggers (package of 6)
 
All amounts shown in USD
Note: Dataloggers are supplied with complete operator's manual and mounting kit (hook/loop, magnet and tape).