LIQUID DETECTOR SENSOROPERATION MANUAL
forTK-015N2
CE Mark ComplianceEN61326

TOYOKO KAGAKU CO., LTD.
Components Business Division
370 Ichinotsubo, Nakahara-Ku, Kawasaki-City, Kanagawa-Pref., JAPAN
Phone: (044)435-5860
Fax: (044)433-5332
MAN-TK15-09.2003-1-Introduction･We appreciate that you evaluate our samples of the PNP outputs liquid detector sensor.
･Before you install or operate it, please read this operating manual thoroughly, and follow
the Instruction in order to avoid any accident, malfunction, defects, and hazards.
･Please keep this manual with good care as long as the sensor is operating.

Table of Contents
1.

Designation of Sensors････････････････････････････････････････････････････････ 32.

Installation････････････････････････････････････････････････････････････････････ 3

3.

Wiring Instruction･････････････････････････････････････････････････････････････ 44.

Adjustments･･････････････････････････････････････････････････････････････････ 5

5. Specifications･･････････････････････････････････････････････････････････････････ 5-2-1. Designation of the Sensor
TK-015N2Sensor Body
Saddle Band

Transparent Tube

Wing Nuts

2.Installation
You can simply install every sensor into a transparent tube, grasping the tube between Sensor
Body and Saddle Band tightened by Wing Nuts.
CAUTION(1) Be sure that the sensing surface (Light emission/reception window) and the tube surface
must contact completely each other.
(2) Be aware that Saddle Band is so fragile that over-tightening with Wing Nuts may cause
the crack of it.
(3) Recommend the torque for tightening will be approx. 2.5〜3.0kgf･cm, and avoid distortionof the Band during tightening simultaneously.

-3-3.Wiring Instruction(1) Generally 4-core cable is supplied with Sensor Body by 2-meter long, 3.8mm diameter.
Red : +24V power
White : Output 1(Liquid Existing – ON)
Yellow : Output 2(Liquid Existing – OFF)Black : 0V power(2) Connect the correct power source to Red and Black lines
CAUTION
Avoid wrong wiring for DC power. (Red line for PLUS polarity, and Black line for Minus.)(3) Keep the load current not exceeding 50 mA. Otherwise, the output circuit of the sensor
may be destroyed.
NOTE : When you apply a relay as a load, add a diode into output connection in parallel
configuration in order to limit the back electromotive voltage.
Refer to the sample chart below :+24V
Output 1Sensor

Output 2-0VRED+24V

WHITEdiodeYELLOWBLACKrelay

DC Power-0V

Note: The above wiring must be applied to the PNP Samples only.

When one of output lines is not used, recommend that it will be connected with +24V foravoiding unexpected shortage with others.
(4) Don’t make any lines contact each other when the power is applied. Damages may occur
on Sensor.

-4-4. Adjustments
Before starting this adjustment procedure, the tube must be empty, and follow the steps
below :
①Install the sensor on the tube and apply the power into it, as followed by the foregoingprocedure. Remove Protection Cap, and turn a Sensitivity Adjusting Pot.(SAP)
counter-clockwise(C-CW) using an adequate small driver. Indicating LED will becomegreen.
②Next, turn a SAP clockwise(CW) slowly until Indicating LED have changed into red, thenstop turning.
③From the above position of SAP, again turn it, in the opposite direction, C-CW by approx
90 degree angle (one-quarter turn).
Indicating LED shows now green.
Now the adjustment has been completed.

5. Specifications
TK-015N2
Power Source
Current Consumption
Tube O.D.(inch)
Detecting Method
OutputIndicating LED
Ambient Temperature
Sensitivity Adjust
Water Protection
Body MaterialCableWeight

DC24V±10%45mA below
6〜25.4mm
Infrared Photoelectric Device
PNP Transistor Open Collector, max 50mA, 2 opposite signals
Red: Liquid exist,
Green: Liquid empty-10℃〜60℃
Available (See above Section 4. for details)
Available (Silicon stuffed-in), IP67 (IEC) equivalent
Poly-Carbonate
3.8mm OD, 4-wire, 2 m
Approx 100g-5-