Optical Level Switch
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SD Optical Level Switch Your Made-To-Order Solutions

WORKING PRINCIPLE The optical liquid level switch uses the principle of total reflection in a prism. Reflection or penetration, is the basis of the level alarm output. When the sensor is surrounded by air, the angle of incidence is greater than the critical angle and thus total reflection occurs. Totally reflected light will be transmitted to the receiver. Conversely, when the sensor is surrounded by liquid, due to the refractive index of the liquid and the sensor tip material, almost all light will penetrate the front of the sensor. Using this principle, the optical liquid level switch...

Housing material Supply voltage Load current Current consumption Output mode Output function reverse polarity protection, short circuit protection Electrical protection Ambient temp. Operation temp. Process pressure IP rating Indicator light PVC, 24 AWG, L=2 m, 3C (blue, green, black, and brown) Cable specifications Installation torque Connection size ※PES(polyethersulfone) is similar PSU(polysulfone), but its heat resistance, strength, and stiffness is better.

Housing material Supply voltage Load current Current consumption Output mode Output function reverse polarity protection, short circuit protection Electrical protection Ambient temp. Operation temp. Process pressure IP rating PVC, 24 AWG, L=2 m, 3C (blue, green, black, and brown) Indicator light Cable specifications Installation torque Thread options Connection size Dimension (Unit:mm)

• NPN, PNP open collector output to energize relay or PLC. • Housing material of PC, PES, SUS304, SUS316 for applicable in water, oil, liquid solution, liquor, alcohol, organic solvent...etc. • Over-current and reverse polarity protected • Lead wire ORDER INFORMATION Housing material — Connection thread A: M12x1 (SD204BRDD-A only, not include M12x1 cable) ^•If you need M12x1 cable, please contact with our sales.

Cable type Tip material Body material Supply voltage Load current Current consumption Output mode Output function NOFNC reverse polarity protection, short circuit protection Electrical protection Delay time Ambient temp. Operating temp. Working pressure Anti-ambient light interference IP rating Indicator light Cable specifications IP 67 Red LED Silicone rubber jacket, 24 AWG, L=2 m, 4C (blue, green and black and brown) Installation torque Thread options Connection size cable, silicone rubber

FEATURES NPN / PNP output selection can be connected to the relay or PLC. This product provides both NO and NC output for selection. Products made of glass and SUS 304/316, diesel fuel, waste water, aqueous solution, alcoholic solution. Includes power polarity and over current protection. LED indicates contact status. There are general cloudy and turbidity for option. You can measure turbid solutions. Also output a delayed-type output can be selected. WIRING Type High position delay Oupput function Standard type Wire color NPN Brown Green Green Green wire Black wire ORDER INFORMATION SD 21...

Motor power detection Glass Zinc-plated steel / SUS304 / SUS316 PA66 glass fiber reinforced Body material Supply voltage Relay specifications Switch life time Ambient temp. Operating temp. Delay time (customization) -Relay ON after applying the supply voltage (3s ± 1s) -Level monitoring after relay ON (30s ± 1s) -Relay OFF after level continue missing (5s ± 1s) -Relay ON after applying the supply voltage (3s ± 1s) -Relay OFF after level continue missing (5s ± 1s) Self-test function process pressure Anti-ambient light interference IP rating Cable specifications Installation torque Connecting...

WIRING DIAGRAM SD22 uses optical technology to achieve level monitoring and is durable to shocks in the environment. Uniquely different design (2 separate parts) compared to the traditional optical switch model. SD 22’s switch body can be removed while the tip remains installed on tank. No tank drainage or leakage required when removing switch. Intelligent process control for not only do liquid level detection,but also with other sensors connected in series so that the full system has protection. According to customer demand, adjustable delay time length. Self-test function. The device is...

Complete Sensor SD 220 Connector of tip and body 0 : Screw joint 1 : Quick coupling Function T : Typical (5 wire) M : Motor power detection (6 wire) Supply voltage 2: AC 50/60Hz 115V ±20% 4: AC 50/60Hz 230V ±20% Thread connection BQ: 1/2" PT BR: 1/2" PF BU: 1/2" NPT M2: M20X1.5 Tip material 0: SUS 304 6: SUS 316 Z: Zinc-plated steel Body Part SDB-B0 Connector of tip and body 0 : Screw joint (F) 1 : Quick coupling (F) Function T : Typical (5 wire) M : Motor power detection (6 wire) Supply voltage 2: AC 50/60Hz 115V ±20% 4: AC 50/60Hz 230V ±20% SDB-T Connector of tip and body 0 : Screw joint...

• Cable wiring to be done in accordance with the operating manual connection. • SD22s parts and body part manually tightened (torque about 10Kgf-cm). • During installation note that the cable outlet direction is downward. • This product is not for solids in solution, solids containing adhesion of suspended or viscous liquids. • SD21 turbid type and SD22 can measure 4000NTU standard turbidity solution. • This product can not be used in the environment with an infrared light source. • We recommend the following installation below. The horizontal plane parallel to the 0° ~ 45° for optimal...

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