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- QEL - Model QTS-1300 Series - Oxygen ...
QEL - Model QTS-1300 Series -Oxygen Transmitter/Sensors
The QTS-1300 Series is the latest advancement in low cost loop powered analog output oxygen transmitters. The QTS-1300 Series is the latest advancement in low cost analog output oxygen transmitters. The compact sensor elements have a typical life span of two to ten years, are easily field replaceable, and do not require electrolyte replenishment. With rapid response to the target gas and stable zero readings, these sensors retain their sensitivity to oxygen. The two wire transmitters are available in a variety of ABS or explosion- proof Nema rated enclosures. The transmitter operates on a power supply range of 12-36 VDC with an output of 4-20mA DC into 750 Ohms (at 24 VDC), making it useable with any standard intrinsic safety barrier. With integral RFI and EMI protection, this is the most robust transmitter available in its class.
Electrochemical Oxygen Sensors are micro-fuel cells designed to be maintenance free and stable for long periods. Gas continuously enters the self-contained cell through a flow limiting diffusion barrier. The target gas reacts within the electrolyte, setting up a microamp current flow between the electrodes. No fluid replenishment is necessary as theses cells are not self consuming. The cell electrodes degrade with time, resulting in typical working lifetimes of 2 to 10 years depending upon the model selected.
The QTS-1300 Series transmitter is powered by a nominal 24 VDC external power supply in a two wire connection. It transmits a 4 to 20 mA signal through the 2 wires over the calibrated range of the sensor selected. The transmitter is factory configured and calibrated for the sensor selected when ordered as a complete assembly. The model QTS-13001 sensor plugs into the transmitter board or into an integrally mounted sensor assembly on the industrial enclosure. The QTS 13101 sensor assembly is lid-mounted with leads and connector for board connection. Solderless shorting links configure the board for a specific sensor type. Calibration is achieved through a simple zero and span adjustment using the appropriate calibration gas.