Optical Level Sensor Specifications & Selection
This optical level sensor specification resource helps buyers compare the key electrical, meicniúil, and wetted-material details before requesting a datasheet, sampla, or quote. HojellyTek manufactures photoelectric optical level sensing solutions in Shenzhen for OEM/ODM projects, umair thionsclaíocha, taiscumair fearais, córais ola, córais uisce, and exported sensor assemblies for US, TÁIMID, and India buyers.
Use this page as a selection checklist before choosing an Braiteoir Leibhéal Optúil for your tank, Rialaitheoir, or equipment design.
Optical Level Sensor Specification Sheet
An optical level sensor is normally selected by matching the control system first, then the tank and liquid environment. The buyer should confirm power supply, ualach reatha, Cineál Aschuir, loighic lasctha, Ábhair fhliucha, teocht, brú, snáithe gléasta, cable style, and IP protection before ordering.
| Mír Sonraíochta | HojellyTek Standard Range / Stádas | Buyer Selection Note |
|---|---|---|
| Prionsabal braite | Photoelectric optical sensing | IR faoi stiúir + Fóta-trasraitheoir + prism tip |
| Voltas soláthair | 5–24VDC | Match PCB, PLC, Modúl sealaíochta, nó ionchur an rialaitheora |
| Supply current / current consumption | TBC | Confirm during RFQ based on model and circuit design |
| Load current | ≤100mA | Check controller input/load limit before wiring |
| Cineál aschuir | NPN / PNP | Choose according to PLC/controller input type |
| Output function | Ní hea / NC | Select based on high-level alarm, Aláram ísealleibhéil, or fail-safe logic |
| Switching response | TBC | Confirm if the liquid level changes quickly or the tank has vibration |
| Standard housing material | SUS316 | Suitable for many water, ola, and industrial liquid-contact applications |
| Standard sensing tip / Ábhar priosma | Gléamar | Used for optical reflection change between dry and wetted states |
| Other material choices | PSU / PTFE / 316 dhosmálta / gloine, confirm by project | Use RFQ review for chemical, teocht, and OEM housing requirements |
| Teocht oibriúcháin | -10~80℃ | Confirm liquid temperature, teocht chomhthimpeallach, agus timthriall glantacháin |
| Rátáil brú | TBC | Confirm for sealed tanks, pressure vessels, caidéil, nó córais bhreosla |
| Snáithe / mount options | 1/2” NPT, G1/2, 3/8” NPT | Match tank boss, Tiús Balla, gasket, agus treo suiteála |
| Rátáil IP | IP67 | Suitable for protected industrial and equipment installations |
| Solas táscaire | Lasta: cumhacht; Faiche: water status | Useful for bench testing and field troubleshooting |
| Datasheet / líníocht / sreangú | Available by request | Use a form, WhatsApp, or email to request the correct model file |
How the Optical Sensing Specification Works
A photoelectric optical level sensor uses an infrared LED, glacadóir fóta-trasraitheoir, agus barr braite priosma-chruthach. Sa stát tirim, the prism reflects light internally back to the receiver. Nuair a chlúdaíonn leacht an priosma, the optical path changes because the liquid has a different refractive behavior from air. The electronics convert that optical change into a switching output.
This makes optical point level sensors useful where the buyer wants compact size, gan aon snámhphointe ag gluaiseacht, fast electronic switching, and a clean signal for low-level or high-level detection. Cén dóigh faoin spéir a ...?, the specification must fit the real liquid and installation. Cúr, boilgeoga, sciath trom, strong contamination, poor mounting angle, incorrect output wiring, or incompatible wetted materials can all create field problems.
Match Electrical Specs to the Controller
The first selection step is power and output. HojellyTek’s standard supply voltage range is 5–24VDC, which allows use in many low-voltage control boards, appliance systems, industrial controllers, and OEM tank monitoring circuits.
For simple point-level detection, the standard output choices are NPN nó PNP. NPN is commonly selected where the input expects a sinking signal, while PNP is used where the input expects a sourcing signal. The wrong output type may make the sensor appear “dead” even when the sensing tip is working correctly. For wiring details, compare the Aschur NPN / PNP guide before confirming the order.
Some projects ask about 4–20 mA because they are used to continuous level transmitters. For this resource page, the confirmed standard range is for optical point level switching. If the application requires an analog continuous signal, the output requirement should be reviewed separately at the RFQ stage rather than assumed.
Load current is also important. The confirmed standard load current is ≤100mA. If the sensor drives a PLC input, this is usually a signal-level load. If the buyer wants to drive a relay, lamp, dordánaí, or solenoid directly, the circuit must be reviewed carefully because those loads may exceed the sensor output rating.
Select NO or NC Logic for the Alarm Function
The same sensor body may be used for different control purposes depending on the switching logic. Ní hea is NC should be selected according to how the machine should behave when the sensing point is dry, lofa, disconnected, or in alarm.
For a low-level protection tank, the buyer may want the controller to stop a pump when liquid drops below the sensor. For an overflow alarm, the buyer may want a signal when liquid reaches the upper point. In safety-related designs, the control engineer should decide whether the normal state should be energized or de-energized so that cable failure, sensor failure, or power loss does not create an unsafe assumption.
Wetted Materials and Liquid Compatibility
The wetted parts decide whether the sensor can survive the liquid. Buyers often compare PSU, PTFE, 316 cruach dhosmálta, agus gloine because each material behaves differently with water, ola, breosla, cuisnithe, chemical liquids, gníomhairí glantacháin, and temperature cycles.
For the current standard listed configuration, the confirmed housing material is SUS316 and the sensing tip is gloine. This combination is useful where corrosion resistance, mechanical durability, and a stable optical prism surface are required. PTFE may be considered for more aggressive chemical environments, while PSU-style housings may be relevant for compact or cost-sensitive OEM applications, but material availability and suitability should be confirmed during RFQ.
Sula n-ordaítear, share the liquid name, tiúchan, teocht, whether the liquid leaves residue, whether the tank is cleaned with chemicals, and whether the sensor tip may be exposed to oil film, scála, cúr, or suspended particles. Optical sensors work best when the prism surface can clearly transition between air and liquid.
Teocht, Brú, IP Rating and Mounting
The confirmed operating temperature range is -10~80℃. This should be checked against both the liquid and the surrounding equipment temperature. A tank in a warm factory may still be within range, while a boiler-side, sterilization, or high-temperature cleaning environment may need a separate model review.
Pressure rating is marked TBC because it depends on the mechanical structure, séala, snáthaid, and final model configuration. If the sensor will be used in a closed tank, pump line, fuel system, coolant circuit, or vessel with pressure fluctuation, pressure must be confirmed before sample approval.
The confirmed IP rating is IP67, which supports many equipment and industrial installations when the cable exit, cónascaire, and installation method are protected properly. IP rating should not be treated as chemical compatibility or unlimited submersion permission; it is only one part of the environmental selection.
Mounting threads include 1/2” NPT, G1/2, and 3/8” NPT. Choose the thread according to tank boss design, Tiús Balla, gasket method, liquid direction, and available space for the cable. Le haghaidh umair OEM, confirm whether the sensor installs horizontally from the side wall, vertically from the top, or into a custom chamber.
Application Mapping Table
| Feidhmchlár | Specs to Prioritize | Selection Notes |
|---|---|---|
| Water tank high/low alarm | 5–24VDC, NPN/PNP, NÍL/NC, IP67 | Confirm controller input type and alarm logic |
| Oil or fuel reservoir | SUS316, barr gloine, thread seal, pressure TBC | Confirm oil film, tonnchrith, agus teocht |
| HVAC condensate or drain pan | Compact mounting, IP67, NÍL/NC | Check contamination, glanadh, and cable routing |
| OEM appliance tank | Voltas, Aschur, snáthaid, méid an choirp | Confirm sample fit before mold or tank design is finalized |
| Industrial liquid tank | Ábhar, teocht, brú, Gléasta | Share liquid data and installation drawings |
| Caidéal cosaint tirim-reáchtáil | Loighic lasctha, response TBC, load current ≤100mA | Confirm fail-safe behavior in controller program |
How to Specify an Optical Level Sensor
Use this checklist before requesting the optical level sensor datasheet or a factory quote.
- Confirm the liquid: uisce, ola, breosla, cuisnithe, chemical mixture, dramhuisce, or another liquid.
- Confirm the function: Aláram Ardleibhéil, Aláram ísealleibhéil, cosaint tirim-rith, Cosc ar Ró-shreabhadh, or OEM status detection.
- Confirm electrical input: 5V, 12V, 24V, Ionchur PLC, Ionchur MCU, Modúl sealaíochta, nó bord rialaithe.
- Roghnaigh cineál aschuir: NPN nó PNP.
- Choose switching logic: NO or NC.
- Confirm load current requirement and whether the sensor only sends a signal or drives another device.
- Confirm material needs: SUS316, gloine, PTFE, PSU, or custom discussion.
- Confirm tank mounting: 1/2” NPT, G1/2, 3/8” NPT, gléas taobh, An Sliabh Barr, or OEM structure.
- Confirm temperature and pressure conditions.
- Share drawing, sprioc cainníochta, cable/connector preference, labeling needs, and export destination.
Modhanna Teip Choitianta le Seachain
Most optical level sensor problems are not caused by the sensing principle itself. They usually come from mismatch between the specification and the application.
A wrong NPN/PNP choice can prevent the controller from reading the signal. A wrong NO/NC choice can reverse the alarm logic. A liquid that coats the prism can delay or block the optical transition. Air bubbles, cúr, or turbulent liquid can create unstable switching near the sensing point. A thread mismatch can cause leakage. A pressure condition that was not disclosed can affect sealing. A load above ≤100mA can damage the output circuit.
The safest approach is to approve the specification, sreangú, líníocht, and sample test before batch production.
HojellyTek Manufacturing Support
Is monaróir agus onnmhaireoir Shenzhen é HojellyTek atá dírithe ar bhrath optúil fótaileictreach, Brath leibhéal leachtach, and OEM/ODM sensor projects. Ár R inmheánach&D team supports model selection, wiring confirmation, Athbhreithniú ábhair, and customization discussions for equipment manufacturers, Dáileoirí, agus ceannaitheoirí tionsclaíocha.
For broader model details, athbhreithniú a dhéanamh ar an táirge braiteoir leibhéal optúil Leathanach, then send your application requirements by WhatsApp or email for confirmation.
Ceisteanna CCanna
What should an optical level sensor specification include?
An optical level sensor specification should include supply voltage, reatha, Cineál Aschuir, Luchtaigh reatha, loighic lasctha, response requirement, Ábhair fhliucha, teocht oibriúcháin, coinníoll brú, Méid na Snáithe, Treo gléasta, Rátáil IP, Riachtanais cábla / cónascaire, and the target liquid.
Is 5–24VDC suitable for my controller?
It may be suitable if your control board, PLC, or input module works within that supply range. You still need to confirm NPN/PNP output, Loighic NO/NC, Luchtaigh reatha, and wiring method before ordering.
Can one sensor detect both water and oil?
Optical sensors can be used in different liquids, but the liquid’s optical behavior, coating tendency, slaodacht, teocht, and chemical compatibility must be reviewed. Uisce, ola, and fuel projects should not be treated as identical without sample testing.
What is the difference between SUS316, PTFE, PSU and glass?
SUS316 is commonly selected for corrosion resistance and mechanical strength. Glass is used as the optical prism tip. PTFE may be considered for aggressive chemicals. PSU-style material may suit some OEM designs. Final material selection should match the liquid and installation.
Do optical level sensors measure continuous level?
Standard optical point level sensors detect whether liquid is present at a fixed sensing point. If your project requires continuous level measurement or 4–20 mA output, state that clearly during RFQ so the correct solution can be reviewed.
Why are pressure and switching response marked TBC?
They depend on the exact model, séala, mechanical structure, and project conditions. Instead of inventing figures, we confirm pressure rating and switching response during datasheet review, Faomhadh samplach, or custom specification discussion.
Download Datasheet or Request a Quote
To receive the correct datasheet, líníocht, wiring guide, and quotation, send your liquid type, voltas, Riachtanas aschuir, Méid na Snáithe, Treo gléasta, rogha ábhartha, teocht, coinníoll brú, agus cainníocht mheasta.
Contact HojellyTek by WhatsApp or email to request a datasheet, plé samplach, or OEM/ODM quote for your optical level sensor project.
