Product Description

Carbon monoxide, is a highly poisonous, colorless and odorless gas that easily spreads through the air. It is formed as a result of incomplete combustion of fuels such as: wood, oil, gas, gasoline, kerosene, propane, coal, oil. Because this gas is colorless and odorless, it is so important to detect the dangerous concentration of carbon monoxide early in the rooms we stay in because it poses a serious threat to human health and life.

Protect yourself and your family from the silent killer !!

The CTW-03 sensor is used to continuously monitor the dangerous concentration of carbon monoxide in the air. When a dangerous concentration is detected, the device activates an audible and visual alarm. Thanks to battery power the device is easy to place anywhere because we do not have to run any installation. It is equipped with an advanced electrochemical sensor with a life span of 10 years and an auto-diagnostic system that indicates sensor damage and a low battery.

It is additionally equipped with an LCD display showing carbon monoxide concentration and information messages. It also has additional functions such as memory of recorded gas concentrations and temperature measurement .

Each copy of the carbon monoxide sensors manufactured by ZAMEL is additionally tested in a specialized test chamber and receives a certificate of correct operation (detection of carbon monoxide concentration at 300ppm in less than 3 minutes).



  • Additionally tested in Poland, certificate of correct detection of 300ppm concentration in less than 3 minutes with the serial number of the given copy entered
  • Battery powered (3 x AA)
  • Low battery signalization
  • Temperature measurement function
  • Electrochemical sensor with increased lifetime (10 years)
  • Optical alarm
  • Sensor damage signaling (self-diagnostic system)
  • Carbon monoxide detection levels (in accordance with PN-EN50291-1: 2010): • 50 ppm (up to 90 minutes) • 100 ppm (up to 40 minutes) • 300 ppm (up to 3 minutes)
  • LCD display showing the current level of carbon monoxide, temperature and other messages
  • Alarm sound signaling (85dB)
  • Memory function of recorded carbon monoxide concentrations
Mounting method Surface mounting
Volume 85 dB(A)
Standalone Yes
Degree of protection (IP) IP20
Place variable Yes
Current supply primary Battery/accumulator
With digital display Yes
Sensor type electrochemical
Number of batteries 3 st
Supply voltage 6 V
Temperature range of operation 0-45 °C
CE certificate No
Battery type AA
Optical signaling Yes
Moisture working range 0-90% RH
Minimum level of carbon monoxide detection 50 ppm
Certified level of carbon monoxide detection 300 ppm
Device diamentions 140x65x35 mm
Colour White
Size of the package 195x160x50 mm