GHM Mess technik GmbH Flow Switches Operating Manual

About this manual

This operating manual provides instructions for the installation, operation, and maintenance of various flow switches with piston and inline structures. It covers safety notes, product descriptions, assembly guidelines, and electrical connection details for models including FW1-.., FW3, FWJ, RVM, NJ/NJV, MR, MR1K, HD1F/HD2F, HD1K/HD2K, HM1K/HM2K, HR1MV, HR2K1/HR2VK1, and HR2K2/HR2VK2.

What's inside

• General safety notes
• Product description
• Structure of the devices
• Assembly and installation
• Electrical connection -panel connector DIN 43650-A
• Electrical connection -PG-/cable screw gland
• Contact protection measures
• Operation elements and functions
• Activation, operation and maintenance

Frequently asked questions

What is the active principle of these flow switches?

A magnet-mounted, spring-supported piston controls the reed switch or microswitch/Hall sensor based on volumetric flow.

Can these devices be used with gaseous media?

No, this product is not intended for operation with gaseous media.

What standards apply to products with an electrical connection?

Products must comply with DIN EN 60947-5-1, the Low-voltage directive 2014/35/EU, and RoHS Guideline 2011/65/EU.