GSTA一氧化碳變送器

GSTA系列一氧化碳、二氧化氮變送器是用于監控地下車庫和裝卸碼頭的氣體濃度。一氧化碳是常用來衡量排氣汽油發動機，而二氧化氮用于柴油發動機。字段選擇電壓和電流輸出允許變送器使用幾乎任何建筑管理控制器。一氧化碳的單位，用戶可以選擇輸出范圍是0至200PPM或0至500PPM。二氧化氮單位與標準的0至10ppm范圍。輸出可以反向20-4mA或10（5）- 0VDC，內置開關輸出

Sensor: Field replaceable electrochemical, 4 years typical lifespan. Recommend calibration every 6 months.

Range: CO: switch selectable 200 or 500 ppm

Output Drift: <5% per year in air.

Coverage Area: 5000 to 7500 sq ft typical.

Accuracy: CO=2% at the time of calibration.

Resolution: CO=1 ppm

Temperature Range: -4 to 122°F (-20 to 50°C).

Storage Temperature: For best sensor life, 32 to 68°F (0 to 20°C).

Humidity Range: 15 to 90% RH constant; 0 to 99% RH intermittent.

Response Time: <45 seconds to 90% CO

Span and Zero Adjustment: Via pushbutton, using optional A-449 display.

Housing: UV resistant glass filled polycarbonate.

Output: Switch selectable 4 to 20 mA (loop powered), 0 to 5 V @ 5 mA, or 0 to 10 V@ 5 mA;
Switch selectable 0 to 5 V / 1 to 5 V and 0 to 10 V / 2 to 10 V;
Switch selectable normal or reverse output.

Power Supply: Current output=10 to 35 VDC;
Voltage output=15 to 35 VDC or 15 to 29 VAC.

Electrical Connection: Removable terminal block, knocks out for conduit fitting.

Calibration: Via pushbuttons using A-449 auxiliary display. Span gas concentration is field selectable.