Teklab Liquid Level sensors







EEx Level Switch. ATEX Metallic IR sensor

eex-level-switch-atexThe EEx electro optical level switches are specially designed to operate in explosive environment where they may come in direct contact with hydrocarbons, fuels, diesel etc.
They have been certified under EEx ia IIC T6 to be intrinsically safe when used for sensing the level of explosive liquids in potentially hazardous locations.
Petrochemicals, heavy duty automotive, leak detection, hydraulic reservoir are some of the typical areas where these electro optic level switches have been deployed.These Eex electro optic level switches use infrared technology and consist of an infrared emitter and an optical receiver. When only air is present in the target object, all the light emitted is reflected internally by the glass dome of the probe and returned to the receiver.
When there is liquid, a large amount of rays emitted is absorbed / refracted by the liquid and thus the IR sensor senses the presence of liquid.
The response time of these sensors is very fast, almost instantaneous and detection accuracy is +/- 1 mm.
They have an operating temperature range up to – 20 deg C to +100 deg CThese level switches have stainless steel bodies which are corrosion resistant and hence can handle strong chemical agents.
They can be mounted in any angle just by threading with the target object.

Click here to download a PDF technical sheet of the EEx Level Switch. ATEX Metallic IR sensor (928 Kb)

Electrical features

Supply voltage : 9 ÷ 28 Vdc
Max temperature range at liquid detecting point : From –20ºC up to +100ºC
Storage temperature : From –20ºC up to +60ºC
Output type : Open collector
Max. output NPN O.C. sink current : 40 mA
Cable capacitance : 140 pF/m
Cable inductance : µH/m
Cable resistance : 39 mΩ/m

Safety Parameters

Ui = 30VDC, Ii = 160mA, Pi = 1,2W
Ingress Protection Code : In front IP68, 20 bar 30min

Chemical compatibility

The sensor body material resists to several aggressive chemical agents; it is strictly to the customer pertinence, the test of compatibility between the sensor itself and the liquid in which the sensor will be used.

Mechanical Dimensions



The sensor is available with the following output types:


Intrinsically Safe Isolators

D1080D  – 2 Ch; Relay Output SPDT;  DC Supply   D1080D Data Sheet

D1081D  – 2 Ch; O.C. Transistor Outputs; DC Supply   D1081D Data Sheet

D1180D  – 2 Ch; Relay Output SPDT;  AC Power Supply   D1180D Data Sheet


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