Extech Heavy Duty Dissolved Oxygen Meter

Extech Heavy Duty Dissolved Oxygen Meter


The Extech Heavy Duty Dissolved Oxygen Meter features a dual display of oxygen concentration and temperature.


  • Fast 0.8 second sampling time
  • Automatic temperature compensation
  • Built-in RS-232 PC serial interface
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The Extech Heavy Duty Dissolved Oxygen Meter features a large 1.4" LCD that displays both oxygen and temperature values. The meter measures dissolved oxygen from 0 to 20.0mg/L and 0 to100.0% oxygen and temperature from 32 to 122°F (0 to 50°C). The automatic temperature compensation function ranges from 0 to 50°C via the temperature probe sensor built into polarographic type oxygen probe. The meter has a fast 0.8 second sampling time, and recalls min/max/avg readings.


The built-in RS-232 PC serial interface gives users the option to connect to a PC using the optional data acquisition software and datalogger. The software and serial cable enable users to display and capture readings on a PC and set time intervals and alarms. 

Notable Specifications:
  • Dissolved oxygen range: 0 to 20.0 mg/L
  • Dissolved oxygen accuracy: ±0.4 mg/L
  • Oxygen range: 0 to 100.0%
  • Oxygen accuracy: ±0.7%
  • Tempeature range: 32 to 122°F (0 to 50°C)
  • Temperature accuracy: ±0.8°C/1.5°F
  • Probe compensation & adjustment (salt):  0 to 39%
  • Probe compensation & adjustment (altitude): 0 to 3900m
  • Probe compensation & adjustment (temperature): 0 to 50°C
  • Meter dimensions: 7 x 2.9 x 1.3" (178 x 74 x 33mm)
  • Meter weight: 17oz
  • Probe dimensions: 20mm(0.8")D 125mm(4.9")L
What's Included:
  • (1) Meter
  • (1) DO probe, 4m cable
  • (3) Membranes
  • (1) Protective holster with stand
  • (1) 9V battery
  • (1) Carrying case
Image Part # Product Description Price Stock Order
Extech Heavy Duty Dissolved Oxygen Meter 407510 Heavy Duty dissolved oxygen meter
Drop ships from manufacturer
Image Part # Product Description Price Stock Order
Extech 380340 Battery Operated Data Logger 380340 Battery operated datalogger
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Extech 407510-P Replacement dissolved oxygen probe, 4m cable
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Extech 407001 Data Acquisition Software 407001 Data acquisition software & serial cable
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Extech 407001-USB USB Adapter 407001-USB USB adapter used with 407001 Data Acquisition software & serial cable
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Extech Heavy Duty Dissolved Oxygen Meter Reviews

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Questions & Answers

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How do I calibrate my meter?
To calibrate, ensure that the sensor is disconnected from the meter. Turn the meter on and slide the O2/DO selector to the O2 position. Press the zero key to null the meter and connect the DO sensor to the top of the meter. Allow the meter to stand for at least five minutes until the display stabilizes. Press the O2 cal key and the display will indicate approx 20.9 (typical O2 in air)
Does the meter have an auto power off feature?
Yes, the meter includes an Auto Shut off feature that preserves battery life. The meter will automatically turn off after 10 minutes of inactivity.

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