Produal UK Ltd.
HK Instruments - Model DPI -Electronic Differential Pressure Switch
FromProdual UK Ltd.
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.
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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
- Accuracy (from FS):±1.5 % (±0.7 % with span point calibration) (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