Optomax Digital Series Liquid Level Switches

SST Sensing’s Optomax Digital level switches are ideal for restricted space applications requiring a miniature, low-power, and low-cost sensing solution. The microcontroller-based sensor is solid state, incorporating an infrared LED and phototransistor that are optically coupled by the tip when the sensor is in air. When the sensing tip is immersed in liquid, the infrared light from the Optomax digital level switch escapes, making the output change state. The sensor can detect the presence or absence of almost any oil- or water-based liquid type. 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 100 mA at a supply voltage range of 4.5 V_DC to 15.4 V_DC and can be configured to output a high or low signal when in either a wet or dry state. A fail-safe PWM option with a supply voltage range of 4.5 V_DC to 5.5 V_DC is also available. It has housing options for internal or external sensor mounting and for use in two operating temperature ranges: standard (-25°C to +80°C) or extended (-40°C 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.

The Optomax Industrial level switches are designed to offer industrial supply voltages and outputs that can directly drive higher power loads. The microcontroller-based sensor is solid state, incorporating an infrared LED and phototransistor that are optically coupled by the tip when the sensor is in air. When the sensing tip is immersed in liquid, the infrared light escapes, making the output change state. The sensor can detect the presence or absence of almost any oil- or water-based liquid type. It is insensitive to ambient light and is not affected by foam when in air or by small bubbles when in liquid. A range of N and P type output configurations can sink or source up to 1 A at supply voltage ranges from 4.5 V_DC to 15.4 V_DC or 8 V_DC to 30 V_DC and can be configured to output a high or low signal in either a wet or dry state. Options for connecting to inductive loads or digital interfaces are also available. With housing threads suitable for external sensor mounting and for use in two operating temperature ranges: standard (-25°C to +80°C) or extended (-40°C 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. The Optomax Industrial level switches were built to the highest quality standards, are highly accurate, and have a good lifespan.

Optomax Industrial Glass range of liquid level switches, often single point, can operate in high pressure, high temperature, aggressive environments due to their stainless steel and glass construction while offering industrial supply voltages and outputs that can directly drive loads. The microcontroller-based Optomax Industrial Glass range of single point liquid level switches are solid state, incorporating an infrared LED and phototransistor optically coupled by the tip when the sensor is in air. When the sensing tip is immersed in liquid, the infrared light escapes, making the output change state. The sensor can detect the presence or absence of almost any oil- or water-based liquid type. It is insensitive to ambient light and is not affected by foam when in air or by small bubbles when in liquid. A range of N and P type output configurations can sink or source up to 1 A at supply voltage ranges from 4.5 V_DC to 15.4 V_DC or 8 V_DC to 30 V_DC and can be configured to output a high or low signal in either a wet or dry state. Options for connecting to inductive loads or digital interfaces are also available. The 316L stainless steel single-point liquid level switch can operate up to 600 bar (8700 psi) with housing threads suitable for external sensor mounting and use in an operating temperature range of -40°C to +125°C.