Dwyer Instruments GSTA-N-D | Nitrogen Dioxide Duct Mount Transmitter with universal current/voltage outputs
The Dwyer GSTA-N-D is a duct-mount nitrogen dioxide transmitter with field-selectable current or voltage outputs for garage, loading dock and mechanical room monitoring. Genuine stock at General Tech Services LLC, UAE, with free UAE-wide shipping. Request a quote in under a minute - call +971 6 5436933.
Part No. GSTA-N-D
Product Overview
The Dwyer GSTA-N-D is a Series GSTA nitrogen dioxide (NO₂) transmitter designed to monitor gas concentrations in mechanical rooms, underground parking garages and loading docks. The nitrogen dioxide version is intended for monitoring diesel-engine exhaust and uses a duct-mount configuration for in-duct sampling.
The transmitter provides field-selectable analog outputs including 4-20 mA, 0-5 V, 0-10 V, 1-5 V and 2-10 V, allowing connection to a wide range of building management and ventilation controllers. Internal DIP switches allow the output to be inverted when required.
The GSTA-N-D has a standard 0-10 ppm nitrogen dioxide range and uses an industrial-grade, field-replaceable sensor. Field calibration can be performed using the A-449 remote LCD service display, which also indicates when the sensor reaches the end of its service life and requires replacement.
The GSTA-N-D-FC carries the same core configuration with a factory calibration certificate.
Key Benefits
- Monitors nitrogen dioxide (NO₂) associated with diesel-engine exhaust
- Industrial-grade field-replaceable sensor
- Field-selectable current and voltage outputs
- Supports 4-20 mA, 0-5 V, 0-10 V, 1-5 V and 2-10 V
- Output can be inverted using internal DIP switches
- A-449 service display supports setup and field calibration
- Duct-mount configuration for in-duct gas sampling
- Factory calibration certificate available with the GSTA-N-D-FC version
- Genuine Dwyer Instruments stock with free UAE-wide shipping
Who This Product Is Best For
- Underground parking garages and loading docks requiring in-duct NO₂ monitoring for ventilation control
- Mechanical rooms requiring diesel-engine exhaust monitoring
- BMS integrators standardising on analog current or voltage gas sensing
- HVAC and ventilation control systems requiring flexible analog signal options
- System integrators requiring a duct-mount NO₂ transmitter for building automation applications
How to Specify & Commission It
- Confirm that the application requires nitrogen dioxide (NO₂) monitoring and select a suitable duct location.
- Install the duct-mount transmitter according to the manufacturer's installation requirements.
- Select the required analog output: 4-20 mA, 0-5 V, 0-10 V, 1-5 V or 2-10 V.
- Configure the output direction using the internal DIP switches if an inverted signal is required.
- Wire the power supply and selected analog output to the building management, ventilation or control system.
- Use the A-449 remote LCD service display for field calibration when required, then verify the transmitter reading and controller response.
Frequently Asked Questions
What gas does the GSTA-N-D detect?
The GSTA-N-D detects nitrogen dioxide (NO₂), used for monitoring diesel-engine exhaust.
What is the standard measurement range?
The standard nitrogen dioxide measurement range is 0-10 ppm.
What outputs are available?
The transmitter provides field-selectable 4-20 mA, 0-5 V, 0-10 V, 1-5 V and 2-10 V outputs.
Can the output signal be inverted?
Yes. The output can be inverted using the internal DIP switches.
Does the GSTA-N-D have an integral LCD display?
No. The GSTA-N-D does not have an integral LCD display. The A-449 remote LCD service display is used for setup and field calibration.
Is the GSTA-N-D wall mount or duct mount?
The GSTA-N-D is a duct-mount nitrogen dioxide transmitter designed for in-duct sampling.
Can the sensor be replaced?
Yes. The transmitter uses an industrial-grade field-replaceable sensor.
How is the sensor calibrated?
Field calibration can be performed using the A-449 remote LCD service display. The service display can also indicate when the sensor requires replacement.
Is a factory calibration certificate available?
Yes. The GSTA-N-D-FC version provides the same core configuration with a factory calibration certificate. The standard GSTA-N-D does not include the factory calibration certificate.
Is genuine Dwyer stock available in the UAE?
Yes. Genuine Dwyer Instruments stock is available through General Tech Services LLC with free UAE-wide shipping. Call +971 6 5436933 for pricing and current availability.
Request a Quote Today
For pricing or to place an order, contact General Tech Services LLC.
Call +971 6 5436933 | www.generaltechshop.ae
