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Ultratech Cement

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Capacitance Continuous Level Indicator

Dependability, strength, durability, ruggedness are the keywords when it comes to the use of level instruments for continuous monitoring in difficult environment conditions. The ILC... series stands up to the requirements of a tough continuous level detector and offers the following benefits:

Level measurement is displayed on a built-in Digital Panel Meter having 0.5 inch high digits for better visibility.
Standard output signal of 0-5 V DC and 4-20 mA DC proportional to 0-100% level change available for remote indicators and recorders.
"In Situ" range selection and calibration possible from evaluation unit. Probe head accessibility not required.
Measuring system has no moving parts so does not suffer any mechanical wear and tear and hence is maintenance free.
Economical to install, since ordinary 3-core cable is used for interconnection.
Flame-proof probe suitable for hazardous areas as per IS-2148 for group IIA and IIB is available.

As far as the service material is concerned, the Continuous Level Indicator can be used with conductive or non-conductive liquids, powdered or grained materials of homogeneous composition having stable dielectric constant. Our clients in the Oil, Food, Water treatment, Diesel, Chemicals etc. industries have used the capacitance continuous level indicator to their satisfaction.

In the ILC...series the measuring electrode and container wall (or grounding probe) form a capacitor with the material serving as the dielectric. A change in material level in the container causes a change in capacitance. The electronic insert converts this change to a proportional DC which is transmitted via the interconnecting cable to the evaluation unit wherein the signal after processing is displayed digitally. A Reference probe is required, when the tank is non-metallic and a grounding tube is required, when the liquid is turbulent or tank shape is curved.

Technical Data

Evaluation Unit

Housing	Cast Aluminium, Weather proof, back panel/wall mounting
Cable Entry	3 Nos. / 2 Nos.
Max. Amb. Temp.	-20o C to + 60o C.
Power Consumption	5 VA approx.
Mains Voltage	230 V or 110 V AC (-15% to +10%), 50 Hz; 24 V AC/DC; 90 to 260 V AC universal power supply. (to be specified while ordering).
Relay Output	One/two set (s) of potential free c/o contacts rated at 230V AC 6A, 50 Hz for non-inductive load per set point.
Fail-Safe Mode	Max. or Min. Field selectable.
Indication	Red LED for alarm, Green LED for normal, Yellow LED for system fault.
Response Time	0.2 Second
Switching Delay for	Adjustable from 0.5 to 20 Second. for probe covered or uncovered condition.
Connection to Electronic Insert	3 - core unscreened cable.
Initial Capacitance	0 to 290 pf. in 3 overlapping ranges. (For single point switching) 0 to 1200 pf. in 3 overlapping ranges.(For pump control & multi point switching)
Switching Hysteresis	0.5 pF. typical. (For independent switching) & Continuously adjustable over the entire range. (For pump control switching)

Electronic Insert - LDC 311

Housing	Plastic, potted in epoxy resin.
Frequency	500 kHz. (approximately).
Ambient Temp.	-20o C to 80o C.
Supply Voltage	15 V derived from evaluation unit.
Output Signal	3 to 12 V DC.

Probe

A wide variety of probes with different mounting connections is available to suit various process applications. We offer specially designed ceramic insulated rod/rope probes suitable for operating temperatures max up to 600o C.