QEL

QEL makes smart gas sensors and control gear that help protect buildings from dangerous levels of CO, NO₂, CO₂, refrigerants, and more.

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Showing 1–16 of 19 resultsSorted by popularity

Replacement Q5/B5, O2 REPL Sensor Oxygen, 25% Volume

QEL

SKU: 85930-016-000
$195.96
QEL Replacement Q5/B5, O2 REPL Sensor Oxygen, 25% Volume quantity
Carbon Monoxide Detector With Relay

QEL

SKU: Q5-CO-250P-0-A

$615.04Add to Cart for Savings

QEL Q5C-CO-250P-0-A Carbon Monoxide CO Sensor quantity
Pre-calibrated hydrogen sensor module, 0–100% LEL

QEL

SKU: 85930-017-018

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M-Controller 2 Multi-Channel Analog / Digital Controller

QEL

SKU: M-CONTROLLER2-x00

$2,085.36Add to Cart for Savings

QEL M-Controller 2 Multi-Channel Analog / Digital Controller For Gas Detection quantity
QEL AI-BOX-0 8 Channel Analog Input Module For Q-Controller

QEL

SKU: AI-BOX-0
$328.02
QEL AI-BOX-0 8 Channel Analog Input Module For Q-Controller quantity
QEL BAC-BOX-0 BACnet IP Output Converter For Q-Controller

QEL

SKU: BAC-BOX-0

$615.04Add to Cart for Savings

QEL BAC-BOX-0 BACnet IP Output Converter For Q-Controller quantity
Ethylene Oxide Electrochemical Pre-Calibrated Smart Sensor Assembly

QEL

SKU: 85930-018-012

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QEL B5-CH4-100L-0-A Methane, Natural Gas Catalytic Bead 0-100% LEL, BACnet, NEMA 4X Enclosure

QEL

SKU: B5-CH4-100L-0-A

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Methane / Natural Gas Smart Gas Transmitter

QEL

SKU: Q5-CH4-100L-0-A

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Nitrogen Dioxide 0–10 ppm Smart Gas Transmitter

QEL

SKU: B5-NO2-10P-0-A

$615.04Add to Cart for Savings

QEL B5-NO2-10P-0-A – Nitrogen Dioxide 0–10 ppm Smart Gas Transmitter quantity
Smart Gas Transmitter B5-CO2-5000P-0-A B5 Carbon Dioxide, Infrared, 0-5000PPM

QEL

SKU: B5-CO2-5000P-0-A

$1,107.07Add to Cart for Savings

QEL B5-CO2-5000P-0-A – Carbon Dioxide Infrared 0–5000 ppm Smart Gas Transmitter quantity
IO-BOX-0 – DIN Rail Mounting Box for Q-Controller Modules

QEL

SKU: IO-BOX-0
$328.02
QEL IO-BOX-0 – DIN Rail Mounting Box for Q-Controller Modules quantity
QEL BI-BOX-0 4 Channel Relay Input Module For Q-Controller

QEL

SKU: BI-BOX-0
$328.02
QEL BI-BOX-0 4 Channel Relay Input Module For Q-Controller quantity
M-Switch – Remote Switch for M-Controller or Q4C Controller

QEL

SKU: M-SWITCHA-0
$328.02
QEL M-Switch – Remote Switch for M-Controller or Q4C Controller quantity
QEL M-Strobe Multifunctional LED Beacon/Sounder Alarm For Gas Detection & Alarm Systems

QEL

SKU: M-STROBE

$442.83Add to Cart for Savings

QEL M-Strobe – Multifunctional LED Beacon/Sounder Alarm for Gas Detection quantity
M-Relay for M-Controller Series Relay Module w/ 8 DPDT Relays

QEL

SKU: M-RELAY-5A-8000000
$385.42
QEL M-Relay – Relay Module with 8 DPDT Relays for M-Controller Series quantity

Simple to Install and Connect

Sensors, controllers, and alarms are designed to wire up easily, work together smoothly, and tie into building systems like BACnet without hassle.

Built for Harsh Spaces

Everything’s made for tough environments like garages and mechanical rooms, with rugged housings and serviceable parts that keep maintenance quick.

Smart Response Without the Guesswork

QEL’s systems respond automatically—turning on fans, sounding alarms, or alerting building controls—so safety actions happen fast and clearly.

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