Smart and versatile range of technology takes the hassle out of the toughest gas detection applications

QEL’s Q5 Series smart, toxic, combustible gas sensors and transmitters utilise a wide range of sensing technologies to detect a large variety of gases. These instruments are housed in a NEMA 4X enclosure with an integral buzzer that can overcome the toughest applications.

All models include an LCD display of gas concentration, LED indication of each of the SPDT relays and TX/RX for the RS-485 or Modbus communications. Pre-calibrated sensors can be purchased and installed by the user, thereby reducing calibration costs and minimizing downtime.

Should an operator need to switch from one gas to another, all he or she needs to do is to purchase a sensor and board and then simply install it. Multiple screens can be chosen from the menu that displays data including relay status, time, TWA, STEL and concentration. Programming and calibration is non-proprietary and accessed via a password, selected by the operator, that protects system integrity. These instruments can be installed as stand-alone and digitally networked with QEL or other manufacturers’ controllers through an RS-485 or Modbus communication port that is standard. Equally a 4-20 mA, 2-10 VDC and a 1-5 VDC analog output that is fully assignable over a chosen range is a standard feature. User-programmable relays and a buzzer are also standard enabling several options to energise relays with instant activation upon a pre-selected concentration or it can be activated through a set time to gauge average concentration.