PemTech's combustible gas detectors are designed with catalytic bead and infrared sensing elements. All of our combustible gas detectors give Lower Explosive Limit (LEL) warnings well before the gas concentration reaches the LEL. The LEL is the minimum amount of gas required to be explosive. Most safety measures require that the warnings be given at 10-20% of the LEL. Our LEL combustible gas sensors feature microprocessor based modular design with non-intrusive auto calibration and digital display. These gas sensors are suitable for use in hazardous environments with reliability and precision. Contact Pem-Tech today to determine which LEL sensor is right for you.