Levelstate Systems Ltd
Levelstate - Model 400+ -Electronic Level Switch (ELS)
Levelstate ELS 400+ provides a reliable and cost effective means of sensing water/steam level in high pressure/temperature applications. Pressure parts available upto 207 bar at 370? as standard (optional: super-critical). With detection upto 4 channels (optional: upto 8 channels) in Type 300+, the installed cost per detection point is appreciably lower. ELS NANO (single channel) is an effective and economical replacement to the float type level switch.
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- Choice of 1-8 channels
- Available for pressure rating upto 207 bar (3000psi)
- Temperature rating of Ambient: -50? to 900?; Storage: -200? to 1100?
- 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 / Electronic unit component failure
- DPCO high capacity relays in each channel with energized/de-energized option
- Adjustable time delay output
- Both co-incidental and vertical validation available
- 2 out 2 voting Fail-safe logic is applied
- Remote display unit available (optional)
- Available for hazardous zone (explosion proof ) and super-critical application
- The technology uses resistivity discrimination between steam and water to provide indication
- Detection level is dependent on water purity and operating conditions i.e. temperature and pressure
- Sensing element is a Probe with an insulated tip inserted in a side-arm Water Column/Probe Insert. Voltage is applied to the tip: conduction occurs between the tip and the inside wall of the Column/Probe Insert
- Resistance <0.1M Ohm indicates water i.e. Probe is immersed in water. Similarly, 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