ALM Overpressure and Vaccum Switches type 620


	Pressure Transmitter
	Differential Pressure Transmitter
	Electronic Pressure Switches
	Pressure Level Transmitter
	Overpressure And Vacuum Switches
	Differential Pressure Switches
	Digital Indicating Device
	Force Cells
	Pressure Measuring Cells

Overpressure and vacuum switches

Type 620

2 - 220 mbar

Pressure range gradation and executions see order code selection table
(PDF Datasheet)

Technical data
Maximum overpressure	Maximum overpressure and test pressure see setting ranges
Lowest turn-on pressure	2 mbar / switching point and switching difference adjustable.
	Smallest switching difference 1 mbar
Reproducibility	+/- 5% of switching point with diaphragm material type A, F,
	but min. +/- 0.3 mbar
	+/- 10% of switching point with diaphragm material FPM / EPDM
	but as a minimum +/- 0.6 mbar
Temperature range	Medium and ambient temperature with diaphragm:
	NBR-based	0 ... 80 °C
	FPM	-10 ... 80 °C
	EPDM	-10 ... 80 °C
	Q (Silicon)	-40 ... 80 °C
Case construction	Switch case fiberglass-reinforced plastic
Diaphragm	A-NBR-based / C-FPM / E-EPDM / F-Silicone
	Parts that come into contact with the medium, to base
	and diaphragm:
	For vacuum switch version also Polyacetal and Inox 1.4301
Contact material /	Nominal voltage type of current	250	250
Loading	Nominal voltage for resistive loading	1 A	6 A
	Nominal voltage for motor loading	0.5 A	3 A
	Contact material	AgCdO	AgCdO
	Standard AgCdO
Electrical connections	Screw terminals (option)
	AMP tab connectors 6.3 mm
	With cover: Cable gland PG 11
Contact system	Changeover contact
Protection class	IP 00 without cover
	IP 54 with cover
	(for installation arrangement electrical connections upward)
Service life	Mechanical and electrical service life:
	10⁶ switching cycles, if the permitted switching difference
	is respected