The DPS 300 is a low range HVAC differential pressure sensor for measuring pressure drops across air filters and airflow through and between ventilation ducts. The lowest possible pressure range is 0…100 pascals and the highest is 0…1000 millibars. User switchable 2 or 3 pressure ranges and volts or current output are included with most standard configurations.
- Pressure Range: 100 Pa up to 1000 mb differential
- Output Signal: 3 wire switchable 0-5/10 Vdc, 0/4-20mA or 2 wire 4-20mA
- Accuracy: 0.5% FS 6mb and above, 1% below 6 mbar
- Electrical Connection: screw terminals via M16x1.5 cable gland
- Process Connection: 6.6 x 11 mm, 4.4 x 10 mm tube fitting
- Media Compatibility: PVC silicone tube, brass nickel plated, ceramic, silicone, epoxy, RTV
- Special Features: Switchable pressure ranges and output signal
- Special Options: Alarm relay switches, auto-zero, square root extraction, LCD display
This differential pressure sensor is purpose built for mounting on a wall or panel to measure air pressure differences in buildings as part of a air handling, BMS or HVAC system.
Each standard pressure range of 1.6, 4, 10, 40, 250, or 1000 mbar has one or two user selectable lower pressure ranges so that a number of dp sensors can stocked as spare and utilised for more than one pressure range.
The output signal can also be altered by the user to be either current or voltage output. As standard you can switch between 4 output configurations which include 0-5Vdc, 0-10Vdc, 4-20mA or 0-20mA. All of these output configurations are 3 wire, but you can also specify a non-switchable 2 wire 4-20mA version as well if necessary.
There optional features and functions that can be included with the DPS 300 which include alarm relay contacts, LCD display and square root extraction output signal. The square root extraction can also be configured for 3√ or 5√ output characteristic, so that it can be used to measure airflow using different pressure to flow conversion methods.
In addition to providing a local pressure reading the optional LCD display also includes menu buttons underneath the front cover to allow access to the sensor configuration settings. A number of parameters can be set via the menu buttons such as high/low values, contact switches, pressure units, zero & span calibration, square root extraction output, auto-zero and locking pin code.