The Optomax Basic range of liquid level switches are an analogue optics only solution designed to meet the demand of price sensitive, high volume OEM applications.
The miniature sensor is solid state, containing only 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 escapes making the phototransistor output change state. The sensor can detect the presence or absence of almost any liquid type, oil or water based.
Because the Optomax Basic range of liquid level switches only contains Optoelectronic components the customer is responsible for interfacing the sensor to their application with technical support from SST. OEM applications can be very price sensitive so by removing the circuit protection, voltage regulation, processing electronics and output stage, the sensor cost is significantly reduced. Available in 3 wire (common cathode/emitter) and 4 wire (galvanically isolated) configurations.
With housing options for internal or external sensor mounting and 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 Basic Range of liquid level switches are only sold in high volumes and have an minimum order quantity of 100 units.
TECHNICAL SPECIFICATIONS
Supply Voltage (Vs) Any with suitable LED current limiting resistor
LED Forward Current (If) 10mA recommended
Output Signal Phototransistor open collector
Operating Temperatures Standard: -25°C to +80°C
Storage Temperatures Standard: -30°C to +85°C
Housing Material Polysulfone or Trogamid®
Sensor Termination 24AWG, 250mm PTFE wires, 8mm tinned
Optomax industrial glass range of liquid level switches which are 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 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 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.
A range of N and P type output configurations can sink or source up to 1A at supply voltage ranges from 4.5 to 15.4Vdc or 8 to 30Vdc 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 for use in operating temperature range -40 to 125°C.
Samples for the Optomax Industrial Glass range of liquid level switches are available on request for this product. For high volume production orders, please contact us.
TECHNICAL SPECIFICATIONS
Supply Voltage (Vs) 4.5VDC to 15.4VDC
8VDC to 30VDC
Supply Current (ls) 2.5mA max. (Vs = 15.4VDC) or
7.5mA max. (Vs = 30VDC)
Output Sink and Source Current (lout) 1A
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
Operating Pressure 0 to 600bar (0 to 8700psi)
Housing Material 316L Stainless steel with glass tip
Sensor Termination Flying leads or M12 connector
OUTPUT VALUES
Output Voltage (Vout): lout = 1A
Vs = 4.5 – 15.4VDC
Output High Vout = Vs – 1.5V max
Output Low Vout = 0V + 0.5V max
Vs = 8 – 30VDC
Output High Vout = Vs – 1.8V max
Output Low Vout = 0V + 0.7V max
The LLHP range of liquid level switches offer larger mounting threads and robust stainless steel housings that can survive in aggressive environments.
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 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.
A range of N and P type output configurations can sink or source up to 100mA at a supply voltage range from 4.5 to 15.4 Vdc or 800mA at a supply voltage range from 10 to 45Vdc, all of which can be configured to output a high or low signal in either a wet or dry state.
The LLHP range of liquid level switches combine a robust stainless steel housing with a chemically resistant Polysulfone or Trogamid sensing tip and a selection of termination options. With large threads suitable for external mounting and for use in two operating temperature ranges; Standard (-25 to 80°C) or Extended (-40 to 125°C).
TECHNICAL SPECIFICATIONS
Supply Voltage (Vs) 4.5VDC to 15.4VDC (±5%)
10VDC to 45VDC (±5%)
Supply Current (ls) 15mA max. (Vs = 12VDC)
35mA max. (Vs = 45VDC)
Output Sink and Source Current (lout) 100mA max. (15.4VDC)
800mA max. (45VDC)
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 Stainless Steel with Polysulfone tip
Sensor Termination Refer to datasheet
OUTPUT VALUES
Output Voltage (Vout): lout = 100mA
Vs = 4.5 – 15.4VDC
Output High Vout = Vs – 1.5V max
Output Low Vout = 0V +0.5V max
Output Voltage (Vout): lout = 800mA
Vs = 10 – 45VDC
Output High Vout = Vs – 1.8V max
Output Low Vout = 0V + 0.7V max
The POS Glass Tip range of liquid level switches are robust and rugged, ideal for operation in harsh industrial environments, aggressive chemicals and extreme temperatures up to 140°C.
The POS Glass Tip sensor is solid state, combining 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 escapes making the output change state. The sensor can detect the presence or absence of almost any liquid type, oil or water based.
Options of N and P type outputs can sink or source up to 200mA at a supply voltage range from 12 to 28Vdc and can be configured to be a high or low signal in either a wet or dry state. The sensor is available with a M12 connector or 3 core cable and also has LED output indication.
The stainless steel body combined with a crystal glass sensing tip allows the POS Glass Tip range of liquid level switches to operate under high pressure conditions up to 80 bar and across two temperature ranges; Standard (-40 to 100°C) or Extended (-40 to 140ºC).
TECHNICAL SPECIFICATIONS
Supply Voltage (Vs) 12VDC to 30VDC
Supply Current (ls) 25mA max.
Output Sink and Source Current (lout) 200mA max.
Operating Temperatures POS187: -25°C to +100°C
POS287: -25°C to +140°C
Storage Temperatures -25°C to +80°C
Housing Material Stainless Steel with Simax crystal glass tip
Sensor Termination M12 Brad Harrison connector or PUR 3×0.25mm2, 2m cable
OUTPUT VALUES
Output Voltage V(out): lout = 200mA
Vs = 12 – 30VDC
Output High Vout = Vs – 1.5V max
Output Low Vout = 0V + 0.5V max
The Honeywell LLE Series Liquid Level Switches have a design similar to SST’s liquid level switches with the only significant difference being that the Honeywell versions have a dome-shaped tip instead of a conical one. They are used for the detection of liquid level or liquid leaks, and designed to drive digital inputs, LEDs, buzzers and indicator lamps.
Honeywell recently announced the obsolescence of their entire range of liquid level switches.
The Honeywell LLE Series liquid level switches use the same operating principle as the SST optical liquid level design, the only difference with the SST liquid level switches are the housings. The SST design has a conical tip rather than a domed one as this improves the overall reliability of the sensors. All thread sizes and other critical dimensions remain identical.
The Honeywell LLE Series Liquid Level Switches have a broad port folio that covers numerous potential applications including home appliances, food and beverage, vending machines, medical, industrial compressors, HVAC, transportation, aerospace and military.
For more information on our Honeywell Series Liquid Level Switches, please contact our technical team who can provide application and technical support on these products.
TECHNICAL SPECIFICATIONS
Specification Value Honeywell Part SST Part
Supply Voltage (Vcc) +5Vdc to +12Vdc ±5% 4.5Vdc to 15.4Vdc
Supply Current 5mA @25⁰C (77⁰F) 2.5mA max
Output Sink Source (lo) 40mA max. 100mA
Operating Temperature -40⁰C to +125⁰C -40⁰C to +125⁰C
Storage Temperature -40⁰C to +125⁰C -40⁰C to +125⁰C
Pressure 5 to 25 bar max. 7 bar / 101 psi maximum
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.
TECHNICAL SPECIFICATIONS
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 PTFE wires, 8mm 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%
The Optomax Industrial range of liquid level switches were designed to offer industrial supply voltages and outputs that can directly drive higher power loads.
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 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.
A range of N and P type output configurations can sink or source up to 1A at supply voltage ranges from 4.5 to 15.4Vdc or 8 to 30Vdc 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 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.
The Optomax Industrial range of liquid level switches are built to the highest quality standards and are not only highly accurate but they also have a good lifespan.
TECHNICAL SPECIFICATIONS
Supply Voltage (Vs) 4.5VDC to 15.4VDC or
8VDC to 30VDC
Supply Current (ls) 2.5mA max. (Vs = 15.4VDC) or
7.5mA max. (Vs = 30VDC)
Output Sink and Source Current (lout) 1A
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 20AWG, 250mm PTFE wires, 8mm tinned
OUTPUT VALUES
Output Voltage (Vout): lout = 1A
Vs = 4.5 – 15.4VDC
Output High Vout = Vs – 1.5V max
Output Low Vout = Vs + 0.5V max
Output Voltage (Vout): lout = 1A
Vs = 8 – 30VDC
Output High Vout = Vs – 1.8V max
Output Low Vout = Vs + 0.7V max
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