Paddle flow switches upgrade to hazardous duties
An
Active Switch and Sensor product story
Edited by the Engineeringtalk editorial team
Nov 19, 2004
The new SF1710 and SF1800 ranges of paddle flow switches can be used in hazardous control and chemical processes.
The SF70 and SF80 range of paddle flow switches has now been replaced by the SF1710 and SF1800 range.
Changes have been made to the construction of the switch housing and the certification of the SF1710 has been raised to explosion proof.
This enables the switch to be used in explosive or potentially flammable environments and extends its application into hazardous control and chemical processes.
Both switches use a reed switch contact activated by the flow of liquid moving a spring-loaded magnet.
The length of the paddle can be modified by the user to change the volume activation rate The switch has an aluminium housing and a stainless steel paddle which is resilient in most liquids and can monitor the flow up to 150C.
Contacts are rated at 30W and 0-200V DC and are SPDT style (single pole/double throw).
The switch is of a robust construction and can be used in most control and process environments by simply threading through the pipe wall with a 1in PT thread.
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