Honeywell Phototransistor Level Switch, Polysulfone Body RS 494-1062

LLE Series
Liquid level sensors

DESCRIPTION
The enhanced series of liquid level sensors incorporates a the dome to the photo-transistor. When liquid covers the
photo-transistor trigger which provides a digital output that dome, the effective refractive index at the dome-liquid
denotes the presence or absence of liquid. boundary changes, allowing some light from the LED to

escape. Thus the amount of light received by the photo-
The mode of operation is derived from the principle of total

transistor is reduced and the output switches, indicating the
internal reflection. An LED and photo-transistor are housed

presence of liquid. This method of liquid level sensing is very
within a plastic dome at the head of the device. When no

fast, and almost instantaneous for water.
liquid is present, light from the LED is internally reflected from

FEATURES BENEFITS
• Solid state technology • Accurate, repeatable switching point
• Small size • Can be mounted in applications where space is limited
• Digital output • Microprocessor compatible
• Pre-wired • Easy to install, saving assembly time
• Electrically robust • Reverse polarity, over voltage, short circuit and transient

protection

TYPICAL APPLICATIONS
• Home appliances
• Spa baths
• Vending machines
• Food and beverage
• Medical
• Compressors
• Machine tools
• Automotive

RS Stock No.:
494-1062
Mfr. Part No.:
LLE102101
Brand:
Honeywell