scope:

This Defence Standard (DEF STAN) provides technical guidance for the selection of sensors and transducers that produce an electrical output signal. These may be suitable for direct reading instrumentation or for coupling into an electronic automatic control and automation system.

This Standard provides guidance on sensors and transducers which are suitable for measuring the level, temperature or pressure of a variable.

The following components are outside the scope of this Standard:

Sensors and transducers, such as pneumatic components, mercury thermometers or mechanical devices which do not produce an electrical output signal;

Dipsticks and other portable liquid level sensors;

Indicators and thermometers which only produce a local indication of temperature;

Local controllers such as level or pressure switches, thermostats, thermal cut-ut switches and relief valves.