FGD3本安型CO气体变送器

添加时间：2010-11-12 编辑：X835 阅读：次

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FGD3本安型CO气体变送器

Features:

• LCD readout

• 4 to 20 milliamp output

• pushbutton calibration

• green flashing 'confidence' LED

• integral sensor for cost sensitive applications

• intrinsically safe

• water and dust proof to IP66

• RFI protected

Specification

Size 122 x 122 x 75mm nominal

Weight 0.65Kg

Gas Types Oxygen / Toxic

Operating Voltage 7 to 30vdc (for 4 to 20 mA signal)

Cable 2 core (plus screen)

Output Signal 0mA - open circuit

2mA – fault.

4mA - zero gas

20mA - full scale gas

22mA - over-range

Max. Cable Loop Resistance Signal - 560 ohms at 24vdc

Sensor Type Electrochemical diffusion

Detection Principle Electrochemical reaction

Operating Temperature - 20 to +40 deg.C

Oxygen - 0 to 99% RH non-condensing

Humidity Range Toxic - 15 to 95% RH non-condensing

Operating Pressure Ambient + or - 10%

United Kingdom Hazardous Area Certification

Standards EN50014, EN50020

BASEEFA Certificate No's Ex97D2288, Code EEx ia IIC T4

Zones 0, 1 & 2

Typical Sensor Characteristics

Gas	Stock Number	Maximum Range	Typical Range Setting	Expected Life (in Air)	Resolution		Response
O2	SS401	0 - 25% vol. *	0 - 21% vol. *	2 years	0.05% vol.		T95<15 sec
H2S	SS402	0 – 100ppm	0 - 50ppm	2 years	1ppm		T90<30 sec
CO	SS403	0 – 500ppm	0 - 500ppm	2 years	1ppm		T90<25 sec
CL2	SS404	0 – 50ppm	0 - 20ppm	2 years	0.1ppm		T90<30 sec
NO2	SS405	0 – 20ppm	0 - 20ppm	2 years	0.1ppm		T90<25 sec
NH3	SS406	0– 1000ppm	0 - 100ppm	1-2 years	1ppm		T90<60 sec
O3	SS407	0 – 2ppm	0 - 2ppm	2 years	20ppb		T90<150 sec
V.O.C.	SS408	0-1000 ppm Detects a range of volatile organic compounds
SO2	SS409	0 – 20ppm	0 - 20ppm	2 years	0.1ppm	T90<35 sec
NO	SS410	0–250ppm	0–100ppm	2 years	1ppm	T90<20 sec
H2	SS411	0–100%LEL	0 – 100% LEL	2 years	1% LEL	< 180 sec
PH3	0 – 1ppm		0– 0.5ppm	18 months	1ppb **	T90<30 sec
HCN	0 – 50ppm		0 – 25ppm	2 years	0.1ppm	T90<200 sec
HCL	0 – 50ppm		0 - 20ppm	1 year	0.1ppm	T90<120 sec

The oxygen instrument is not designed for hazardous area use in oxygen-enriched atmospheres.

Hazardous area applications must be in the range is 0-21%.

** The resolution of the sensor itself is 15ppb.

Typical MCU Control Unit Oxygen and Toxic Alarm Level Settings (Adjustable)

Gas Level 1 Level 2 Level 3 Max. Adjustable FSD