Model / Part Number: LGW 10 A4
Availability subject to quotation and stock confirmationSupplied for maintenance, retrofit and replacement projects. Exact suffix, configuration and condition must be confirmed before ordering.
WhatsApp InquiryResponse within 1 business dayIndependent supplier; model, suffix, condition and availability require confirmation.
The DUNGS LGW 10 A4 is an adjustable differential pressure switch with a 1–10 mbar setting range for monitoring gas or air pressure in burner, boiler, furnace, ventilation and HVAC control systems. It operates without auxiliary power and provides an SPDT switching contact with IP54 protection.
The DUNGS LGW 10 A4 is an adjustable differential pressure switch designed in accordance with EN 1854 Class S for automatic burner controls. Differential pressure acts on a diaphragm and setting spring, causing the SPDT contact to change state when the actual pressure rises above or falls below the selected setpoint.
The model has a setting range of 1–10 mbar, a maximum switching differential of 0.5 mbar, a maximum operating pressure of 500 mbar and an IP54 transparent cover. The P+ G 1/4 connection can be used for approved gas or air applications, while the P− G 1/8 connection is for air only.
The sensing mechanism operates without auxiliary power. Silver-contact and gold-plated-contact versions are available, together with M20 × 1.5 cable-entry and G3 plug variants. The exact order number, contact rating, electrical connection and pressure-port configuration must be confirmed from the product nameplate before quotation or replacement.
| Brand | DUNGS - |
|---|---|
| Model | LGW 10 A4 - |
| Standard version | Ag-M-MS9-V0-VS3 - |
| Order number | 272344 - |
| Product function | Adjustable differential pressure switch - |
| Operating principle | Mechanical diaphragm and microswitch - |
| Auxiliary power | Not required - |
| Setting range | 100-1000 Pa |
| Maximum operating pressure | 50 kPa |
| Switching difference | ≤0.5 mbar |
| Setting tolerance | ±15 % |
| Contact arrangement | SPDT, COM/NO/NC - |
| Contact material | Silver (Ag) - |
| Switching voltage AC | 24-250 V AC |
| Switching voltage DC | 24-48 V DC |
| Nominal current | 10 A AC |
| Switching current, resistive load | 0.02-6 A AC, cos φ 1 |
| Switching current, inductive load | 0.02-3 A AC, cos φ 0.6 |
| Switching current DC | 0.02-1 A DC |
| Pressure connection P+ | G 1/4 female, ISO 228 - |
| Pressure connection P- | G 1/8 female, ISO 228 - |
| Test nipple | Integrated, diameter 9 mm |
| Electrical connection | Screw terminals via M20 x 1.5 cable gland - |
| Protection class | IP54 - |
| Ambient temperature | -15 to +70 °C |
| Medium temperature | -15 to +70 °C |
| Storage temperature | -30 to +80 °C |
| Housing base material | Die-cast aluminum - |
| Transparent hood material | Polycarbonate - |
| Diaphragm material | NBR - |
| Pressure switch class | Class S according to EN 1854 - |
| Approvals | AGA, CE, EAC, UA, UKCA, SIL - |
| Country of origin | Germany - |
| Availability & Delivery | Availability subject to quotation and stock confirmation |
|---|---|
| Lead Time | RFQ confirmation required |
| Shipping Options | Air freight, sea freight, express |
| Packaging | Secure export packaging |