All diaphragms up to and including 250kPa are made of 316 StSt., above this range they are cold galvanised spring steel (C 70 W 1) protected as standard with self adhesive 0.005" thick PTFE sheet (Teflon). Other protection materials are also available for the diaphragms and/or bottom chamber process connections.

To deliver a more positive drive from the diaphragm to the movement, we utilise a large (160mm diameter) diaphragm for all ranges from 2.5 to 40kPa inclusive. This feature also makes these gauges much more sensitive to better measure small pressure changes (than can smaller diaphragms) and positively operate accessories such as electrical contacts, maximum pointers etc.

Models 250 and 253 are specially made for chlorine applications, having a silver plated diaphragm and a nickel plated bottom chamber/process connection. See chart below.

Sydney Office Unit 10, 272-274 Victoria St., Wetherill Park NSW 2164 Phone 02 9604.3544 Fax 02 9604.3677 email nswsales@ambitinst.com.au