Electronic Drum Level Indicator

4200-BDLI-1 ELECTRONIC DRUM LEVEL INDICATOR V. Automat 4200-BDLI-1 is designed to satisfy basic level indication for boiler drum, feed water heaters and others. 4200-BDLI-1 consists of major 03 components: 1. The column with probes. 2. Electronic Unit 3. Remote Display Steam/water interfaces in the various high pressure and high temperature steam drums operated in electricity generating power plants, sugar, steel, cement, paper and petrochemical industries requires close monitoring and controlling for safe, efficient and reliable operation. FEATURES:- ◆ Maximum operating pressure- 300 bar ◆ Maximum operating temperature- 560 deg.C ◆ Measure steam/water interface level ◆ No moving parts ◆ Alarm indication local and remote. ◆ Individual indication of damaged, leaky short circuit electrode. ◆ Indication of disconnected wire. ◆ Output signal compatible. ◆ Number of signals up to 05 relays. ◆ Number of electrodes can be selected 08,10,12 & 16. ◆ High pressure high temperature & low pressure and low temperature selected electrodes. ◆ High pressure high temperature & Low pressure and low temperature selected water column. ◆ Simple installation and setup and easy maintenance. ◆ Display alarm for broken wire, leaky electrode or material build up electrodes. ◆ Microprocessor based CPU. ◆ Output signal are compatible with industrial PLC.

In the water column, fit two columns of off-set electrode along with the opposite side within the given C-C distance, which is usually installed to the boiler drum or feed water such that one half of the electrodes are above the normal water level. The water column is connected between the water and steam pipes which are attached to the boiler drum. Isolation valves shall be mounted between water column and boiler drum so that installation of electrode or maintenance work can be performed without shutting down the operation. Electrode from each side of two column are connected to electronic unit by individual cables. Two conductors are connected to each electrode, one for signal drive and other for return signal. A low frequency square wave is used to drive the electrodes through drive registers. Electronic unit input board each powered by its own power supply measure the signal from each electrode and feed alternate segments of display. The electronic unit performs a resistance measurement between the insulated tip of each electrode and the wall of water column. The resistance measured in water is significantly less than that measured in steam. The presence or absence of water is determined at each point, and the level of water in indicated.

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