High quality fixed oxygen gas(O2) detector transmitter with relay

Specifications Sensor module block design.Simple operation,flexible & diversified output signal.Economic & Efficient.Succession, short delivery

                                                                                 High quality fixed oxygen gas(O2) detector transmitter with  relay QB2000N/T-02 is a High quality fixed oxygen gas(O2) detector transmitter with  relay , with 4-20 mA or RS485 ModBus RTU output proportional to the gas leakage concentration with original imported electro-chemical sensor. The fixed oxygen gas detector monitors gas leakage by natural diffusion. It is flexible, durable, accuracy, stable and etc. and it can be directly connected with DCS systems or Central unit.This fixed oxygen gas detector/transmitter with relay output, once the concentration exceed the preset alarm point(threshold) it will start the acoustic-optical alarm on the central unit and drive the external equipment like exhaust fans.It has been widely used in petrol, chemistry, metallurgy, artifice, gas transportation, biological medicine and water procession etc.    Characteristics:  4-20mA analog output(3+ channel) for direct communication to DCS system,  RS485 ModBus output for central unit  Relay output for connecting external device  Sensor module(block) design on -spot replacement s and automatically distinguish sensor fault and current display fault simultaneously.  Password verification for repeat operation, avoid fault operations.  -40~+70°C following compensation for accurate detecting.  Second grade visual alarms on-site and Relay(connected with audible/visual alarms or drive exhaust device). User-selectable alarm setpoint(s).  Note: QB2000N is with the digital display screen but QB2000T is without the digital display screen.   Technical parameters: Sensor type: original imported electro-chemical sensor  Range:0-30%VOL Resolution: 0.1%VOL Accuracy:<= + 3% F.S Response time:T90<30s. Working current:≤50 Ma Output signal: 4 to 20mA standard signal(RS485 output optional) Power supply to the detector terminals: 16~30V DC. Ambient Parameter: Temperature:-20°C~+60°C.  Humidity: < 90%(without condensating) Type of cable: 3 or 4 active wires screened between detector and centralized unit. 3×1.5mm2  for 4-20mA signal OR 4*1.5mm2 for RS485 signal, external diameter: >=10mm Transmition Distance:<=1000meter Mounting Screw thread: G1/2. Weight:1200g. Anti-explosion Class: Ex d IICT6Gb Protection Class:IP66.                   

Detector Model	Gas Detected	Range	Range Optional	Resolution	Responding Time
CO Detector	CO	0-1000ppm	0-500/2000/5000ppm	1ppm	≤20s
O2 Detector	O2	0-25%VOL	30%VOL	0.1%VOL	≤20s
O3 Detector	O3	0-10ppm	0-100ppm	0.01ppm	≤20s
H2S Detector	H2S	0-100ppm	0-50/200/1000ppm	1ppm	≤30s
H2 Detector	H2	0-1000ppm	0-5000ppm	1ppm	≤30s
CL2 Detector	CL2	0-20ppm	0-10/100ppm	0.1ppm	≤30s
NH3 Detector	NH3	0-100ppm	0-50/500/1000ppm	1ppm	≤30s
SO2 Detector	SO2	0-20ppm	0-50,1000ppm	0.1ppm	≤30s
NO Detector	NO	0-25ppm	0-500ppm	0.1ppm	≤30s
NO2 Detector	NO2	0-20ppm	0-50/100ppm	0.1ppm	≤30s
CH2O Detector	CH2O	0-50ppm	0-5/10ppm	0.01ppm	≤30s
HCL Detector	HCL	0-20ppm	0-20/100ppm	0.5ppm	≤30s
Flammable Gas Detector	EX	0-100%LEL	0-100%LEL	1%	≤30s
For the gas that is not covered here though, please don’t hesitate to contact us.