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The GS-N300-W is a high-performance CO2 sensor designed for demanding DCV (Demand-Controlled Ventilation) applications. Utilizing Non-Dispersive Infra-Red (NDIR) CO2 measurement with ABC (Automatic Baseline Correction) logic to ensure exceptional accuracy and reliability. This advanced sensor combines CO2, Relative Humidity (RH), and space temperature measurements into a single network connection, delivering significant cost savings compared to using separate RH and temperature transmitters. Built with time-tested BACnet MS/TP and Modbus RTU firmware, the GS-N300-W stands out for its dependability, making it the only approved wall-mounted RS-485 CO2/RH/T sensor for GreenTrol outdoor air controllers.
CO2 Measurement: Provides the CO2 level in ppm via the network connection
System Status Alarm: Yes
Baud Rate, Protocol and Addressing: DIP switch
End of Line Termination: Jumper
Important: Modification of the factory default settings requires that power is cycled to the device. It is recommended that each device is bench configured prior to installation OR settings are provided at the time of order so that the device can be factory configured prior to shipment.
Technology: Telaire Non Dispersive Infrared (NDIR)
Range: 0 to 2,000 ppm
Accuracy: 400 to 1,250 ppm ±30 ppm or 3% of reading, whichever is greater 1,250 to 2,000 ppm ±5% of reading + 30 ppm
Temperature Dependence: 0.36% FS/°F [0.2% FS/°C]
Pressure Dependence: 0.33% of reading per 0.1 in. [2.54 mm] Hg
Stability: <2% of FS over life of sensor (15 year typical)
Calibration Interval: Not required when ABC logic is enabled
Response Time: <2 minutes for 90% step change typical
Signal Update: Every 4 seconds
Warmup Time: 2 minutes operational, 10 minutes to achieve maximum accuracy
Technology: Integral Bandgap PTAT
Range: 32 to 122 ⁰F [0 to 50 °C]
Accuracy: ±1.08 ⁰F [0.6 °C] @77 ⁰F [25 °C]
Temperature Dependence: 0.36% FS/°F [0.2% FS/°C]
Pressure Dependence: 0.33% of reading per 0.1 in. [2.54 mm] Hg
Resolution: 0.36 ⁰F [0.2 °C]
Calibration Interval: Not required when ABC logic in enabled
Response Time: <2 minutes for 90% step change typical
Signal Update: Every 4 seconds
Warmup Time: 2 minutes operational, 10 minutes to achieve maximum accuracy
Technology: Planar Capacitive Polymer
Range: 0 to 100% RH
Accuracy: 1±3% <20% RH ±2% 20% to 80% RH ±3% >80% RH
Resolution: 0.4% RH
N1
Type: Non-Isolated, field selectable MS/TP BACnet master or Modbus RTU connection
B.A.S. Object/Register Read/Write Access: Yes
Device Load: 1/8 load
Supported Baud Rates: 9.6, 19.2, 38.4 and 76.8 kbaud
Environmental Limits
Temperature: 32 to 122 ⁰F [0 to 50 ⁰C]
Humidity: 5 to 95%
Power Requirement: 24 VAC (22.8 to 26.4 under load) @1.5V-A
Dimensions: 4.56H x 3.25W x 1.09D in. [115.8 x 82.6 x 27.7 mm]
