The TP4/7 surge protection device is a unique unit providing a level of protection for field-mounted transmitters that is far in excess of the optional transient protection facilities available from the transmitter manufacturers - without invloving any additional wiring, conduit modifications or other expensive extras.

• Specifically designed for Multivariable Transmitters and Level Transmitters
• Four wires protected, one pair at 12V to 24V and one pair at 7V (e.g. RS485)
• Easy and direct mounting - simply screws into spare conduit entry
• Intrinsically safe and flameproof to CENELEC standards
• FM, CSA and ATEX approved