Submittal Sheet

ManualsBrandsDwyer ManualsCO2 SensorsCarbon Monoxide Transmitter w/ Universal Current/Voltage Outputs

The Series GSTA and GSTC Carbon Monoxide/Nitrogen Dioxide

Transmitter monitors gas concentration in underground parking garages

and loading docks. The carbon monoxide transmitter is used to measure

the exhaust of gasoline engines, while the nitrogen dioxide transmitter

is used for diesel engines. The Series GSTA has eld selectable current

and voltage output, and the Series GSTC is compatible with either

BACnet or Modbus

communication protocol, allowing the transmitters

to be used with almost any building management controller. To maximize

the accuracy of the transmitters, the sensors can be eld-calibrated

using the A-449 remote LCD display. When the sensor reaches the end

of its life, the display will indicate that the sensor needs to be replaced.

• Industrial grade electrochemical sensor means longer sensor life and less frequent sensor replacements

• Field replaceable sensors extend transmitter’s working life

• Remote LCD display makes select models more cost effective by only needing one display for multiple transmitters

• Field selectable current and voltage outputs on GSTA and BACnet or Modbus

communication protocol on GSTC allow for

gas sensing solutions to be used with almost any building management controller

• Parking garages

• Loading docks

• Automobile service bays

• Boiler or mechanical rooms

FEATURES/BENEFITS

DESCRIPTIONAPPLICATIONS

SERIES GSTA & GSTC | CARBON MONOXIDE/NITROGEN DIOXIDE

GAS TRANSMITTER

Wall mount with LCD Wall mount without LCD Duct mount

SPECIFICATIONS

Sensor Field replaceable electrochemical, 4 years typical lifespan.

Range NO2: 10 PPM; GSTA CO: Switch selectable 200 or 500 PPM; GSTC CO: 500 PPM.

Output Drift <5% per year in air.

Coverage Area 5000 to 7500 ft2 typical.

Accuracy CO: 2% FS; NO2: 3% FS, at the time of calibration.

Resolution CO: 1 PPM; NO2: 0.1 PPM.

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

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

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

Response Time <45 s to 90% CO; <25 s to 90% NO2.

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

Housing UV resistant glass lled polycarbonate

Output

GSTA: Switch selectable 4-20 mA, 0-5 V or 0-10 V; GSTC: BACnet MS/TP or Modbus

RTU (switch selectable)

communication protocol.

Power Supply

GSTA: Current output: 10-35 VDC, Voltage output: 15-35 VDC or 15-29 VAC; GSTC: 10-36 VDC or isolated 21.6-

33 VAC.

Electrical Connection Removable terminal block, knock outs for conduit tting.

Calibration Via pushbuttons using A-449 display. Span gas concentration is eld selectable on CO units.

Weight 1 lb (0.45 kg).

Agency Approvals CE.

Summary of content (2 pages)

PAGE 1
® SERIES GSTA & GSTC | CARBON MONOXIDE/NITROGEN DIOXIDE GAS TRANSMITTER Wall mount with LCD Wall mount without LCD Duct mount FEATURES/BENEFITS • Industrial grade electrochemical sensor means longer sensor life and less frequent sensor replacements • Field replaceable sensors extend transmitter’s working life • Remote LCD display makes select models more cost effective by only needing one display for multiple transmitters • Field selectable current and voltage outputs on GSTA and BACnet or Modbus® comm
PAGE 2
DIMENSIONS WIRING DIAGRAM 3-23/64 [85] 3-45/64 [94.06] 3-1/8 [107.95] 1 2 3 I OUT WIRING 4 POWER SUPPLY + 2-55/64 [73] 2-15/64 [56.75] V OUT WIRING 1 3 4 POWER SUPPLY - + 2-15/64 [57] + - - RECEIVER 4-17/32 [115.09] GSTA voltage output COM PWR 3-59/64 [100] 1 HOW TO ORDER Use the bold characters from the chart below to construct a product code. GSTA -N + RECEIVER GSTA current output 5-7/64 [129.