EDPS / EPDS switches convert differential or gauge pressure into an ON/OFF contact signal. A graduated adjustment dial sets the switching pressure, while separate high- and low-pressure hose ports connect to the monitored air system. Suitable applications include HVAC, ventilation, filter blockage detection, fan monitoring, cleanrooms, dust extraction, positive-pressure ventilation and negative-pressure exhaust systems.
Use air or nonflammable, noncorrosive gases. The white standard version has an ABS base; the green version uses a PA6 engineering-plastic base. A transparent polycarbonate cover protects the adjustment and electrical connections.
| Adjustment range | Hysteresis | Error |
|---|---|---|
| 20–200Pa | 10Pa | ±15% |
| 30–300Pa | 10Pa | ±15% |
| 40–400Pa | 20Pa | ±15% |
| 50–500Pa | 20Pa | ±15% |
| 200–1000Pa | 100Pa | ±15% |
| 50–2500Pa | 150Pa | ±15% |
| 20–300Pa | 10Pa | ±15% |
| 30–500Pa | 20Pa | ±15% |
| 100–1000Pa | 50Pa | ±15% |
| 1000–5000Pa | 250Pa | ±15% |
| Parameter | Specification |
|---|---|
| Maximum working pressure | 10kPa |
| Operating temperature | -40°C to 85°C |
| Contact arrangement | SPDT |
| AC contact rating | 1.5A (0.4A) / 250VAC |
| DC current limit | 0.1A maximum |
| Protection | IP54 |
| Service life | 1,000,000 operations |
| Pressure connections | Two Ø6mm ports; Ø8mm outside-diameter hose |
| Recommended tubing | Ø5mm inside diameter, length no greater than 15m for fast response |
| Mounting | Optional bracket or integral Ø4.5mm mounting holes |
Loosen the cover screw, route the cable through the cable gland and secure the conductors to the terminal block. Terminal 1 is normally closed, terminal 2 is normally open and terminal 3 is common. Connect the higher pressure to P1 (+) and the lower pressure or vacuum to P2 (-).
Factory calibration uses vertical mounting, with the pressure connections perpendicular to the horizontal plane. Horizontal mounting raises the switching point by 20Pa relative to that setting. Select the mounting orientation before calibration and avoid upside-down mounting for settings below 50Pa.
Accessories include self-tapping screws, screw terminal blocks, plastic pressure taps and flexible pressure tubing. The English manual provides the complete range table, dimension drawing, connection assignments and adjustment instructions.
