Electronic Drum Level Indicator

electronic drum level indicator is an advanced electronic water level monitoring system. an edli system includes multiple probes fitted to a water column and connected to an electronic unit, which is widely accepted as a reliable & maintenance free equipment. pressure parts available for applications upto 207 bar at 370°c as standard. electronics available in various configurations and include type 201, type 202 and type 202b.

features

choice of 8 to 48 channels for various levels of visibility depending on site requirement

available for pressure rating upto 207 bar (3000psi) @ saturated temperature

dual power supply with 100% redundancy and power supply failure indication (ac/dc)

self diagnostic features to detect open-circuit/short-circuit/ probe contamination/ internal component/ ground failure

fully validated trip logic eliminates spurious trip

fully configurable multiple spco/dpco relay outputs with energized/de-energized and time delay output options

multiple remote display facility

opto-isolated dual 4-20ma analogue output

digital water level indicator in mm (optional)

available for hazardous zone (explosion proof) and super-critical application

approvals :

quality system accredited to iso 9001

design approval of pressure parts, operational and field testing of the system

third party inspection, testing and certification by approved international agencies

certification of explosion proof to international standard for use in hazardous area

operating principle

the technology uses resistivity discrimination between steam and water to provide indication

detection level is dependent on water purity and boiler operating conditions i.e. temperature and pressure of boiler

sensing element is a probe with an insulated tip inserted in a side-arm water column. voltage is applied to the tip: conduction occurs between the tip and the inside wall of the column

resistance 0.1m ohm indicates steam i.e. probe is in steam.

an electronic discrimination circuit is used to discriminate the probe resistance and generate the display logic accordingly

a vertical display of multiple green/red leds provide resolution for the water level indication

components:

water column

probe

electronic unit

remote display unit

probe cable