DPI

Electronic differential pressure switch and transmitter

The DPI series electronic pressure measuring devices are engineered for building automation in HVAC/R industry. The most technologically advanced and versatile electronic differential pressure switches on the market, combining up to two relay outputs and 0–10 V output options.

The DPI includes the following field selectable features:
• Configurable switching point: Open on rise or fall in pressure
• Hysteresis of setpoint
• Measurement units (Pa, kPa, mmWC, inWC, mbar)
• Measurement range (4 ranges per model)
• Output signal (0−10 V, NO/NC)
• Span and zero point calibration

Technical details

Accuracy (from FS): ±0.7 % (±1.5 % initial) (including: general accuracy, temperature drift, linearity, hysteresis, and repetition error)
Long term stability, typical 1 year: ±1 Pa (±8 Pa without autozero element -AZ)
Zero point calibration: automatic with autozero element (-AZ) or by pushbutton
Supply voltage: 21–35 VDC / 24 VAC ±10 % (without -AZ option)
24 VDC ±10 % / 24 VAC ±10 % (with -AZ option)
Current consumption: 35 mA + relays (7 mA each) + AZ (20 mA) + 0…10 V output (10 mA)
Output signals: 0…10 V, L min 1 kΩ
Relay output 1 (250 VAC / 30 VDC / 6 A)
Optional relay output 2 (250 VAC / 30 VDC / 6 A)
Operating temperature: -10...+50 °C
Response time: 0,5...10 s
Protection standard: IP54

DPI

Example
DPI±500-2R-D

Model

Product series

DPI
Differential pressure indicator
DPI

Measuring ranges (Pa)

±500
±100 / ±250 / ±300 / ±500
2500
100 / 250 / 1000 / 2500
±500

Number of relays

-1R
One relay
-2R
Two relays
-1R

Zero point calibration

-AZ
With autozero calibration
Standard with pushbutton manual zero point calibration
-AZ

Display

-D
With display
-D

Other Pressure switches: