4920H22 Pressure switch 
Key Specifications

• Brand / Manufacturer: Euroswitch (often distributed or cross-referenced with brands like Beaumanor) 
• Series: 49 Series Diaphragm Pressure Switch 
• Pressure Range: 1 to 12 bar (adjustable or factory-set)
• Contact Type: SPDT (Single Pole Double Throw) electrical contacts 
• Thread / Port: G1/4 BSPP (or similar gas thread variants) 
• Diaphragm Material: Viton / NBR options depending on the specific sub-variant 

You can find replacement options or specs through suppliers like the or check technical documentation via the If you are looking to purchase or troubleshoot this part, let me know:

• What machine or system it is installed on
• Whether you need a replacement supplier or adjustment instructions