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The Type 1 LLE series is available in 3 wire format and features a flange style moulded polysulphone housing with a 12 mm thread for external insertion. The Optical Liquid Level Sensor uses a photo-transistor trigger which provides a digital output that denotes the presence or absence of liquid. This series incorporates reverse polarity, over voltage, short circuit and transient protection. Features, Solid state technology, Small size , Digital output, Pre-wired , Electrically robust Benefits, Accurate repeatable switching point, Can be mounted in applications where space is limited , Microprocessor compatible Easy to install, saving assembly time. Typical Applications, Home appliances ,Spa baths , Vending machines, food and beverage, medical, compressors, machine tools Go to Order Guide for detailed product listings. Specifications
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| Operation mode
| User defined single point on/off switch (Output is high in air)
| Repeatability (mm)
| ± 1
| Hysteresis (mm)
| 2 (dependent on liquid)
| Response time
| Rising liquid level – 50 µS
Falling Liquid level – 1 second max (in ethanol)
Response in other liquids dependent on viscosity
| Mechanical
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| Mounting
| Type 1 and 2 – mounted from outside; Type 3 and 5 – mounted from inside
| Termination
| 250 mm flying leads (180 mm for metal versions)
| Blue 0V
| Red +5V to +12V supply
| Green Output
| Material (Note 1)
| Polysulphone
| Dimensions
| Plastic
LLE101/102/103 Series
| Metal
LLE205/305
| Dome
| 3.5 mm radius (includes LLE 105 Series)
| Thread
| M12 x 1
| ½ in BSPT
| Hex
| 19 mm
| 24 mm (See mounting drawing)
| Environmental
| Standard Temperature
| High Temperature
| Operating temperature (°C)
| -25 to +80 (-13°F to +176°F)
| -40 to +125 (-40°F to +257°F)
| Storage temperature (°C)
| -30 to +85 (-22°F to +176°F)
| -40 to +80 (-40°F to +257°F)
| Thermal testing
| As per BS EN60068-2-33
| Humidity
| As per BS EN60068-2-30
| Vibration
| As per BS EN60068-2-6 Part S3: 1996
| Mechanical Shock
| As per BS EN60068-2-27 Part 2 Ea: 1987
| Pressure range (bar)
| 0 to 5 (plastic housing) (Note 2)
0 to 25 (metal housing)
| Ambient IR light limit
(@ 940nm) (Note 3)
| 10 mW/cm2 in operation
| Electrical
| Standard Temperature
| High Temperature
| Supply voltage (Vcc)
| +5Vdc to +12Vdc ± 5%
| Supply current (mA)
| 15mA nominal @ +5V
| 5mA nominal @ +5V
| Output sink current (Note 4)
@ 5Vdc
| @ 25 oC 10mA max
| @ 25 oC 40mA max
| @ 80 oC 3mA max
| @ 125 oC 7mA max
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