At Presair, we are pleased provide you with a technical differential pressure switch cross-reference guide. This guide helps you compare our products with those of notable competitors like Lefoo, Herga, and Dwyer Instruments.
Features of Presair Differential Pressure Switches
Presair Differential Pressure Switches offer field adjustability or factory settings from 0.25 inches of water to 35 inches of water. These switches respond to rapid pulsing, and their gold-plated silver contacts handle low-level switching currents. The “slow make, slow break” mechanism ensures reliable operation. Additionally, adjustable air bleeds can be supplied on either side of the diaphragm for pulse-sensing applications.
Why Choose Presair?
In comparison, Presair’s differential pressure switch offers a more compact solution than Lefoo and Dwyer Instruments while maintaining precision. Furthermore, Presair provides custom solutions to meet your application requirements and maintains a 1-2 week lead time.
For more details, view the product page. To purchase, click here.
Competitor Comparison
This guide includes the following models:
Lefoo: LF31/32 series
Herga: 6753 series
Dwyer Instruments: ADPS, EDPS, and BDPA series
Whether you are an experienced technical professional or exploring alternatives, our cross-reference guide will help you find the right match for your needs.
Differential Pressure Switch Cross-Reference
Manufacturer |
Presair |
Lefoo |
Herga |
Dwyer Instruments |
Product Name |
D1000 SERIES |
LF31/32 |
6753 |
ADPS / EDPS / BDPA |
| Mounting Styles & Air Connections | 3mm body molded mount holes, 3.8mm air entry | 4 Molded Screw Holes / side mount spouts | 0.4mm spout, screw through mount holes in molded body | 5/16:OD Tubing, 1/4″ID tubing, push through screw terminals |
| Construction | Plastic | Plastic | Thermoplastic | Plastic |
| Diaphragm Material Options | EPDM | Silicone | Neoprene | Silicone |
| Function | Open or close on Rise / Fall of Pressure or Vacuum | Open or Close on Rise / Fall of Pressure or Vacuum | Open or Close on Rise / Fall of Pressure or Vacuum | Open or Close on Rise / Fall of Pressure or Vacuum Pressure |
| Pressure Range | 0.25WC – 35WC | 0.15WC – 34WC | 2.25WC – 14 WC | 0.8WC – 20WC |
| Max. Proof Pressure | 250WC | N/A | 14.5 PSI | 40 WC |
| Contact Configuration | SPST | SPST SPDT | SPST | SPDT |
| +100,000 Max. Resistive Cycle Rating @250VAC | 750mA | 1.5A | 0.5A | 1.5A |
| Certifications | UL, cUL | UL, cUL, CE | UL, cUL | UL, cUL |
| Country of Origin | USA | China | UK | China |
