Extech SDL150 Dissolved Oxygen Meter

Extech SDL150 Dissolved Oxygen Meter


The Extech Dissolved Oxygen Meter/Datalogger measures dissolved oxygen from m 0 to 20.0mg/L and 0 to 100.0%oxygen plus temperature from 32 to 122°F.


  • Stores 99 readings manually and 20M readings via 2G SD card
  • User programmable sampling rate: 1 second to 8hrs:59min:59sec
  • Automatic temperature compensation
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The Extech Dissolved Oxygen Meter/Datalogger features a dual backlit display of oxygen concentration and temperature. The meter measures dissolved oxygen from 0 to 20.0mg/L and 0 to 100.0%oxygen plus temperature from 32 to 122°F (0 to 50°C). The automatic temperature compensation is from 0 to 50°C via the temperature probe sensor built into polarographic type oxygen probe.


An offset adjustment is used for zero function to mae relative measurements. The datalogger stores 99 readings manually and 20M readings via the 2G SD card. User programmable sampling rates are from 1 second to 8hrs:59min:59sec. The built-in PC interface lets users easily transfer data points to a PC for further analysis. Additional meter functions include min/max, data hold, automatic power off, and disable. 

Notable Specifications:
  • Dissolved oxygen range: 0 to 20.0 mg/L 
  • Dissolved oxygen accuracy: ±0.4 mg/L
  • Probe compensation and adjustment: salt: 0 to 50%
  • Oxygen range: 0 to 100.0%
  • Oxygen accuracy: ±0.7%
  • Probe compensation and adjustment: altitude: 0 to 8910m
  • Temperature range: 32 to 122°F (0 to 50°C)
  • Temperature accuracy: ±0.8°C/1.5°F
  • Probe compensation and adjustment: 0 to 50°C
  • Meter dimensions: 7.2 x 2.9 x 1.9" (182 x 73 x 47.5mm)
  • Meter weight: 25.6oz(725g)
  • Probe dimensions: 28mm(1.1")D x 190mm(7.5")L
What's Included:
  • (1) Datalogger
  • (1) Probe with 4m cable
  • (6) AA batteries
  • (1) SD card
  • (2) Spare replacement membranes
  • (1) Electrolyte
  • (1) Hard carrying case
Image Part # Product Description Price Stock Order
Extech SDL150 Dissolved Oxygen Meter SDL150 Dissolved oxygen meter
Drop ships from manufacturer
Image Part # Product Description Price Stock Order
Extech 407510-P Replacement dissolved oxygen probe, 4m cable
Drop ships from manufacturer
Extech 780417A Replacement membranes, pack of 10
Drop ships from manufacturer
Extech 780418 Internal DO fill solution, pack of 2
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Extech 153117 117V AC Adapter 153117 117V AC adapter
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Extech SDL150 Dissolved Oxygen Meter Reviews

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Questions & Answers

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Does my meter come ready to use?
Before first use, the probe needs to be filled with the included electrolyte solution.
Can I turn the backlight off?
The backlight can be turned on and off by holding the backlight button for 1.5 seconds.

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