Plastic Sensors


Plastic Sensors

The plastic level switch has been designed for use in level monitoring applications for the control of the lquid presence and can be suitable for a lot of applications.
read more about plastic infrared sensors

Metallic Sensors


Metallic Sensors

Metallic sensors can be suitable for a lot of applications due to the wide chemical compatibility assured by the fused glass dome with the stainless steel body.
read more about metallic infrared sensors

Sensors with temperature output


Metallic Sensors with temperature output

This series of switches incorporates the 4-20mA temperature output. 
read more about 4-20mA infrared sensors

Atex Sensors


Atex Sensors

The sensor has been manufactured to achieve the ia intrinsically safety, and to work in potential explosive environment – IIC Group – in the T6 (85ºC) temperature class.
read more about Atex infrared sensors
K25 4-20 mA Level Switch. Metallic IR sensor
K25 4-20 mA Level Switch. Metallic IR sensorThe K25 optical level switches are designed for use in level monitoring for controlling the oil or liquid CO2 in transcritical or sub critical applications.

They have bodies made of stainless steel and sensor dome made of glass.
They are economical, dependable, and compact in size with overall dimensions of 90 x 36 mm and have no moving parts.

They not only sense the level but also measure the temperature of the liquid via 4-20mA output.

These level switches use infrared technology for their operation.
They have an operating temperature range of -40 to 125 deg C.
There is a programmable timer inside these K25 optical level switches that allows a delay time to be set for delaying the output switching.
The output modes are normally closed in presence of liquids and open in air or vice versa.
The DC digital output current is up to 50mA depending on model and the temperature output is 4-20mA analogue current output

These level switches must not be installed close to any infrared sources.
The dome must be at least 50mm away from any reflective surface (directly contact us for lower distance installations).
They have electronic protection against transient over voltage and reverse polarity.
The K25 optical level switches have a detection accuracy of +/- 2 mm.
They can withstand maximum pressure of 150 bars.
Click here to download a PDF technical sheet of the K25 4-20 mA optical liquid level switch (625 Kb)

Technical Data of the Instrument

Operation mode : Detect liquid presence with contact
Repeatability : ± 2 mm
Body materials : Stainless Steel
Sensible dome : Glass
Electronic protections : Transient over voltage, reverse polarity
Max. temperature range : From –40ºC up to +125ºC
Storage temperature : From –40ºC up to +125ºC
Supply voltage : 24 VDC ± 10%
Supply current (level section) : 20mA max
Output type : NPN
DC Output load current : up to 50 mA max
Output mode : Output Normally Open or Closed in the air
Temperature output : Analogical from 4 to 20 mA
Max pressure : up to 150 bar
Delay times : Customizable depending on application needings

Temperature Reference

Temperature (°C) Current (mA) Voltage (mV)(*)
-40 4 400
-30 5 500
-20 6 600
-10 7 700
0 8 800
10 9 900
20 10 1000
30 11 1100
40 12 1200
50 13 1300
60 14 1400
70 15 1500
80 16 1600
90 17 1700
100 18 1800
110 19 1900
120 20 2000
(*) Example with an external load of 100 ohm resistor

Electrical Connection


Mechanical Dimensions


Copyright 2008-2009 - Teklab S.r.l. - Via Emilia Ovest, 1179 - 41123 Modena - Italy - P.IVA 01976750362 - Company Register of Modena n. 01976750362 - Paid-in Capital Euro 10.000 i.v.