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Optomax - Digital Liquid Level Switch for Oil and Water Detection
The Optomax digital range of liquid level switches are ideal for applications with restricted space that require a miniature, low power and low cost sensing solution. The microcontroller based sensor is solid state, incorporating an infra-red LED and phototransistor which are optically coupled by the tip when the sensor is in air. When the sensing tip is immersed in liquid, the infra-red light from the Optomax Digital sensor escapes making the output change state. The sensor can detect the presence or absence of almost any liquid type; oil or water based. It is insensitive to ambient light and is not affected by foam when in air or by small bubbles when in liquid.
The TTL compatible push-pull output can sink and source up to 100mA at a supply voltage range of 4.5 to 15.4Vdc and can be configured to output a high or low signal when in either a wet or dry state. A fail-safe PWM option is also available with a supply voltage range of 4.5 to 5.5Vdc.
With housing options for internal or external sensor mounting and for use in two operating temperature ranges; Standard (-25 to 80°C) or Extended (-40 to 125°C).
Available in two chemically resistant housing materials, Polysulfone, the standard choice for most applications or Trogamid, which is typically used in food and beverage applications although these liquid level switches can be used in other applications.
- Solid state technology
- Miniature package
- Wide range of mounting options
- Choice of housing material; Polysulfone (standard) or Trogamid®
- Standard and extended temperature ranges (-40C to +125C) available, high pressure (20 bar) option
- Wide range of power supplies and outputs
- Reverse polarity, ESD and transient over-voltage protected
- Built-in output delays available on request
- Accurate, fast response, high reliability, long life
- Ideal for applications where space is limited
- Easy to install
- Compatible with wide range of fluids & chemicals
- Able to meet application specific requirements
- Easy to interface with customer electronics
- Robust electronics
- For applications where sloshing causes intermittent switching
- Supply Voltage (Vs): 4.5VDC to 15.4VDC or
- 4.5VDC to 5.5VDC @(PWM output)
- Supply Current (ls): 2.5mA max. (Vs = 15.4VDC)
- Output Sink and Source Current (lout): 100mA
- Operating Temperatures: Standard: -25°C to 80°C
- Extended: -40°C to 125°C
- Storage Temperatures: Standard: -30°C to 85°C
- Extended: -40°C to 125°C
- Housing Material: Polysulfone or Trogamid
- Sensor Termination: 24AWG, 250mm PVDF wires, 10mm tinned
OUTPUT VALUES
- Output Voltage (Vout):: lout = 100mA
- Output High: Vout = Vs - 1.5V max
- Output Low: Vout = 0V + 0.5V max
- PWM:
- Duty Cycle In Air: 25% ±10%
- Duty Cycle In Liquid: 75% ± 10%
- Frequency: 2kHz ± 10%