Uni-T UT337A CO Meter

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UT337A is a portable meter for detecting carbon monoxide gas.


UT337A is a portable meter for detecting carbon monoxide gas. It can measure a wide range of CO concentrations with a short response time. Users can set up both audio and visual alarm.


  • Self-calibrated sensor
  • Data hold
  • LCD backlight
  • Auto power off
  • Display current CO concentration and Max concentration at the same time
  • Calibration function, adjustable zero-point for temperature compensation
  • High/low audio and visual alarm
  • ℃/℉ selectable.


1 x  UT337A CO meter and 12-month warranty.


Specifications UT337A
CO Measure Range 0~1000ppm
Accuracy ±5% or 5ppm
Resolution 1ppm
Response Time <60s (90% of reading)
Sensor Type Electrochemical Gas Sensor (CO)
Sampling Method Diffusion
Max Hold
Alert Value Setup
Audible Alert
Virtual Alert
Temperature Display
Sensor Self-Test
User Calibration
Display Backlight
Low Battery Indication
Auto Power Off
General Characteristics
Power AAA 1.5V x 4
LCD Size 26.5mm × 35.5mm
Product Color Red and Grey
Product Net Weight 140g
Product Size 197mm × 54.8mm × 33.8mm
Standard Accessories Batteries
Standard Individual Packing Blister, English Manual



Uni-T 337A CO Meter English Manual