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STG QAI

Measures indoor air quality and drives the equipment. 4.3" display, relay and 0–10 V outputs, STG network.

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STG QAI, white enclosure with 4.3-inch display
MeasuresT · RH · CO · CO₂depending on the sensor package
Drives1 relay · 1 × 0–10 V outputon/off or proportional command
Shows4.3" display · web interfacereadings and settings, local or remote
CommunicatesModbus RS-485 · wirelessBMS and STG wireless network
How it works

Measures, decides and drives in one device.

From the monitored quantities, the QAI commands the equipment through its own outputs. When the equipment is far away, the command travels over the STG network to a DRV.

Mode 01

Local actuation

The QAI directly commands a compatible fan or damper: on/off through the relay, speed or opening through the 0–10 V output. No intermediate controller.

STG QAI
STG QAI
relay
0–10 V
Wave fanVentilation box
Compatible fan or damper
For small automations

Sensing, interface and actuation in one device, next to the equipment it commands. One relay output and one analogue output: for more actuation points, combine with a DRV.

Mode 02

With a remote DRV

The QAI acts as a networked sensor and controller; the STG DRV, at the equipment, executes the command received over the STG wireless network.

STG QAI
STG QAI
STG wireless network
STG DRV
STG DRV(AC via relay · EC via 0–10 V)
→ One of these units
Wave fanWave fan
Ventilation boxVentilation box
AFSW EC axial exhaust fanAFSW EC axial exhaust fan
Jet fanJet fan
Single-phase AC or EC fans. One unit per DRV, as the project defines.
Technical data

Product specifications.

Request the datasheet →Manual ↗
Quantities
Temperature
0 to 45 °C
Humidity
0 to 100% RH
CO₂
400 to 10,000 ppm
CO
0 to 500 ppm
Package
one of the combinations below
Outputs
Relay
1 digital, 10 A · on/off
Analogue
1 × 0–10 V · speed or opening
Equipment
compatible fan or damper
Interface
Display
4.3" on the device
Web
readings and settings, local or remote
Version
white room enclosure, 4.3" display
Communication
Modbus
RS-485, for the BMS
STG network
wireless, with the DRV and other devices
Location
in the room, near the equipment it commands
Sensor combinations
  • Temperature and humidity
  • CO₂
  • CO
  • CO + temperature and humidity
  • CO₂ + temperature and humidity

Each STG QAI leaves the factory with one of these combinations.

Sensor package, output limits and compatibility with the driven equipment are confirmed by engineering in the quote.

Where to use

Main applications.

Cross-section of a building with three rooms under demand-controlled ventilation
Fresh air

Ventilates only when air quality calls for it. Local actuation by the QAI or distributed with a DRV.

See application →
STG QAI with display
Air quality

CO₂, CO, temperature and humidity readings in the room, with local display and web interface.

See application →

STG QAI in your project?

Tell us the room, what you need to measure and the equipment to command. Engineering confirms the configuration and returns the proposal.

WhatsApp →41 3056 3431