At Presair, we are pleased to provide you with a technical adjustable pressure switch cross-reference guide. This guide assists you in comparing our products with those of notable competitors like Tecmark, Herga, and Lefoo.
Features of Presair Adjustable Pressure Switches
Presair adjustable pressure switches offer straightforward electrical on/off control over pressures. As pressure increases, one contact opens while the other closes, providing an ideal solution for monitoring, controlling, and notifying. These switches are field adjustable but can also be preset at the factory if preferred. Additionally, dual switches are available, factory set to operate two separate microswitches at different pressure settings. With multiple body styles, these switches offer the necessary versatility for various air hose connections.
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Competitor Comparison
This guide includes the following models:
Tecmark: 3000, 3900, 4000, VTBS3000, V4000 series
Herga: 6731, 6732, 6741, and 6742 series
Lefoo: LF25 series
Whether you are an experienced technical professional or exploring alternatives, our cross-reference guide helps you find the right match for your needs.
Adjustable Pressure Switch Cross-Reference
Manufacturer |
Presair |
Tecmark |
Herga |
Lefoo |
Product Name |
P Series |
3000,3900,4000,VTBS3000,V4000 |
6731, 6732, 6741 & 6742 Series |
LF25 |
| Mounting Styles & Air Connections | 1/8 NPT, 9/16″-18 UNF Thread Mount w/ 1/8 NPT, 1/4 NPT, Radial Mount with Side Air Spout, Direct Mount with Center Air Spout | 1/8” NPT male, 1/4” NPT male, 3/16” barbed, 1/8”, 3/16” or 1/4” compression | 1/5″ (5.08mm), 1/8″ BSPT / NPT BRASS | NPT 1/8-27 or NPT 1/4-18 male, G 1/8 male |
| Construction | Plastic | Plated Steel, Plastic | Plastic, Steel, Brass | Plastic, Steel Plating |
| Diaphragm Material Options | Nitrile, EPDM, Silicone | Nitrile, EPDM | Urethane | Nitrile, EPDM, FVMQ |
| Function | Open or Close on Pressure Rise or Fall | Open or Close on Pressure Rise or Fall | Open or Close on Pressure Rise or Fall | Open or Close on Pressure Rise or Fall |
| Pressure Range | 2.50 inches of water to 125 PSI | 2″WC to 100 PSI | 1.50 inches of water to 120 PSI | 3 psi to 130 [so |
| Max. Proof Pressure | 200 PSI | 120 PSI | 150 PSI | 145 psi |
| Contact Configuration | Single Pole, Single Throw (SPST); Single Pole, Double Throw (SPDT); Double Pole, Double Throw (DPDT) | SPST, SPDT, DPST, or DPDT | SPST, DPDT | SPST OR SPDT |
| +100,000 Max. Resistive Cycle Rating @120VAC | 25 Amps | 25 Amps | 21A | 16A |
| Certifications | UL, cUL RoHS & REACH Compliant | UL, cUL RoHS & REACH Compliant | UL(508 Specific models only), RoHS & REACH | UL, CUL, RoHS REACH |
| Country of Origin | USA | USA | UK | China |
