Useful functions on digital pressure switches
A
SMC Pneumatics (UK) product story
Edited by the Engineeringtalk editorial team
Jan 22, 2002
Two new digital pressure switches, for use with air, inert gas, and non-flammable gas, give a high-speed response of 2.5ms or less, and one includes an anti-chattering function
SMC Pneumatics has launched two new series of High Precision Digital Pressure Switches, for use with air, inert gas, and non-flammable gas, designated the ZSE/ISE 30 and 40.
The ZSE for vacuum/low pressure, and the ISE for positive pressure.
These models give a high-speed response of 2.5ms, or less.
The ZSE/ISE40, in addition, offers a stable switch output, possible even with sudden changes in the primary pressure, i.e when operating large bore cylinders.
This function is known as 'anti-chattering'.
Devices such as large bore cylinders and high-flow vacuum ejectors consume a large volume of air when they operate, and this may cause a momentary drop in the primary pressure.
'Anti-chattering' prevents such momentary pressure drops from being detected as abnormal pressures, by allowing the response time selection to be changed.
The ZSE30/ISE30 has a two colour (green and red) digital display giving a choice of four settings (depending upon application requirements), and therefore allowing abnormal operating conditions to be detected at a glance.
The display is easy to set as the raised, soft touch, rubber button controls are clearly set apart, ensuring ease and simplicity of operation.
The units are lightweight (43g without lead wire), and space saving, when panel mounted only 6mm stands proud, and where more than one switch is required any number of units can be stacked vertically or horizontally.
Bracket mounting is also an option.
Time can also be saved, in installation, as the ZSE/ISE30 series has a plug-type connector to take the burden out of wiring work and, for the future, maintenance.
Being dust-tight and splash proof the unit is also IP65 compatible.
Both series offer pressure ranges of -100.0 to 100.0kPa (compound) 0.0 to -101.3kPa (vacuum), and 0.000 to 1.000Mpa (positive), and three types of piping, allowing for various methods of installation.
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