HVAC & cleanrooms
Air differential pressure, duct temperature and humidity, and room-condition measurement for ventilation and building systems.
Room pressure and air conditions are measured at different locations. A differential-pressure transmitter connects to two air-pressure points; a duct probe measures inside the air stream, while a wall-mounted transmitter measures room air.
Air pressure
Room and ventilation pressure differences
The HPT-8 measures low differential pressure in gas applications. Its two pressure ports connect to the air-pressure points being compared. Display and non-display configurations are available for ventilation and room-pressure measurement.
HPT-8Low differential pressure transmitter
- Connection
- Two gas-pressure ports
- Signal options
- 4–20 mA, 0–10 V or RS485
Duct conditions
Temperature and humidity in the air stream
The SBW-19 uses an extended vented probe to measure air temperature and relative humidity inside a duct. The enclosure stays outside the duct, with display and plain-front versions available. The probe is intended for air measurement.
SBW-19Duct temperature and humidity transmitter
- Humidity range
- 0–100% RH
- Signal options
- 4–20 mA, voltage or RS485
Room conditions
Wall-mounted temperature and humidity
The SBW-17 measures air temperature and relative humidity with a local dual-reading display. Wall mounting suits monitored rooms and equipment spaces where the reading needs to remain visible at the measuring point.
SBW-17Wall-mount temperature and humidity transmitter
- Temperature spans
- 0–50 °C or −20–80 °C version
- Supply
- 12–36 V DC; nominal 24 V DC
Configuration for your application
Measuring location
Identify the two air-pressure points, duct insertion location or room-air position for each instrument.
Span and indication
Choose the differential-pressure or temperature span and whether local indication is needed.
Building-system interface
Select the current, voltage or RS485 version to match the building-system input and available power supply.