
The Optomax Digital optical liquid level switch from SST Sensing detects the presence or absence of liquid using an infrared LED and phototransistor in a prism tip – no moving parts, compact and highly reliable for water, oils and chemicals. ISE is an official SST Sensing distributor.
Technical specifications
| Parameter | Value |
|---|---|
| Supply voltage (Vs) | 4.5 to 15.4 VDC, or 4.5 to 5.5 VDC (PWM output) |
| Supply current | 2.5 mA max. (Vs = 15.4 VDC) |
| Output sink/source current | 100 mA |
| Operating temperature | Standard −25 to 80 °C; extended −40 to 125 °C |
| Storage temperature | Standard −30 to 85 °C; extended −40 to 125 °C |
| Housing material | Polysulfone or Trogamid |
| Termination | 24 AWG, 250 mm PTFE wires, 8 mm tinned |
Output values
| Output | Value |
|---|---|
| Output high | Vout = Vs – 1.5 V max (Iout = 100 mA) |
| Output low | Vout = 0 V + 0.5 V max |
| PWM duty cycle in air | 25 % ±10 % |
| PWM duty cycle in liquid | 75 % ±10 % |
| PWM frequency | 2 kHz ±10 % |
Wiring
| Wire | Designation |
|---|---|
| Red | Vs |
| Green | Output |
| Blue | 0 V |


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Where to buy SST optical level switches?
EQUIPMENT INDUSTRIAL SOLUTION CO., LTD (ISE) – Ho Chi Minh City, Vietnam – supplies genuine SST optical level switches with technical consulting, fast quotation and on-site commissioning support across Vietnam and Southeast Asia.
Contact us: Sales +84 909 617 185 – Technical +84 979 117 185 – Email: [email protected]