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Red handheld carbon monoxide meter with backlit LCD display

TENMARS ELECTRONICS

TENMARS ELECTRONICS TM-801 CO Meter 0–1,000ppm electrician tool

SKU CH-CK81-NCK2Q MPN TM-801

Measures carbon monoxide up to 1,000 ppm with backlit dual display and adjustable alarm

  • Labor warranty1 Year
  • Product typeTest Equipment
  • Color and finishRed
  • Number of items1 pack
  • Sold asBox
  • Parts warranty3 Years
  • Measures carbon monoxide up to 1000ppm for safety
  • Dual display shows CO and temperature simultaneously
  • Backlit 4-digit LCD readable in low light
  • Adjustable alarm warns at user-set CO levels
  • Runs approx 90 hours on six AAA batteries

Purpose & Audience

The Tenmars TM-801 is a handheld carbon monoxide meter designed for electricians, HVAC technicians and safety inspectors who need to verify CO levels up to 1,000 ppm. It simultaneously displays gas concentration and ambient temperature on a backlit four-digit LCD, making it suitable for spot checks in residential, commercial or industrial environments.

Pre-Purchase Checks

Confirm that the measurement range of 0 to 1,000 ppm covers the expected concentrations in your application. The unit requires six AAA batteries or an optional 9 V DC adaptor, neither of which are included, so plan for a power source before deployment. Calibration can be performed at 100 ppm or 500 ppm reference points using standard calibration gas.

Thermals, Noise & Power

The meter draws power from six AAA cells for approximately 90 hours of continuous operation, or from a 9 V, 0.5 A adaptor when mains supply is available. It has no moving parts, so operation is silent. The specified operating temperature spans -20 °C to 50 °C, and the sensor maintains its stated accuracy within the 23 °C ±0.5 °C, RH <75 % reference condition.

How it compares

Measured against everything we stock in Electrical Trade Tools & Kits, at today’s prices. Recalculated every night.

Price $131.99
Pricier than about 63% of the 5,006 comparable items (median $95.99).

Specifications

Product
Brand nameTENMARS
Model nameTM-801
Product typeTest Equipment
Color and finishRed
In the box
Number of items1 pack

Questions about this item

Does the TM-801 come with the six AAA batteries it needs, or must I buy them separately?

The meter requires six 1.5 V UM-4 (AAA) batteries, which are not included in the box. It can also run from an AC 100–240 V supply or a 9 V/0.5 A DC adaptor (9 mm jack).

The TM-801 only has one measuring range; is there any version or capacity choice to make?

No. The TM-801 offers a single CO range of 0–1,000 ppm and a temperature range of –20 °C to 50 °C. There are no alternative range or capacity models to select.

What does the stated ±(5 % + 2 ppm) accuracy mean when I take a reading in a real room?

At the reference condition of 23 °C ±0.5 °C and below 75 % RH, a displayed value can differ from the true concentration by up to 5 % of the reading plus 2 ppm. The sensor typically lasts three years.

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