5V Optical Infrared Water Level Sensor (Low-Current Module)
The 15ma 5v optical infrared water liquid level sensor is a low-current photoelectric point-level sensor module for water tanks, Te mau vairaa pape na'ina'i, Te mau mana'o tauturu no te, test equipment, and MCU-based liquid detection systems. Buyers usually verify four items first: 5V DC supply, approximately 15mA current draw, NPN open-collector output, and direct MCU input compatibility. HojellyTek supplies optical water level sensors from Shenzhen with OEM/ODM support for housing material, niuniu niuniu, tu'atiraa, Te haamauraa, e te faanahoraa o te output.
Low-Current 5V Optical Water Level Sensor Capabilities
This 5V infrared optical water level sensor is designed for single-point liquid presence detection. It does not measure continuous tank height; it confirms whether liquid has reached the sensor tip position. For buyers comparing a standard matini hi'opo'a with a compact PCB-friendly module, the key value is fast, contactless optical switching at a defined level point.
Typical project use cases include:
- Water tank low-level or high-level detection
- Small appliance reservoir protection
- Smart dispenser and humidifier liquid detection
- Laboratory device liquid presence sensing
- Pump dry-run protection input
- Embedded MCU water detection modules
- OEM smart tank products using gateway, WiFi, Tuya/Smart Life, or local controller logic
The module is suitable when the control board already works on 5V logic and the buyer wants a low-current sensor input without adding a relay, float arm, or mechanical moving part.
Electrical Specs Buyers Verify First
For this product type, the most important buying decision is not the appearance of the sensor; it is whether the electrical output matches the controller. A low-current 5V optical infrared sensor is usually selected because it can be powered from the same regulated 5V rail as the MCU board.
| Electrical Item | Specification / Buyer Check |
|---|---|
| Te uira o te uira | 5V DC |
| Te taviriraa i teie nei | Approximately 15mA |
| Rave'a hi'opo'araa | Infrared photoelectric optical sensing |
| Te huru o te ohipa | NPN open-collector output |
| Controller compatibility | Direct MCU input compatible when pull-up and logic level are correctly designed |
| Rave'a hi'opo'araa | Point-level wet/dry detection |
| Signal use | Digital level input for alarm, Te hi'opo'araa i te pamu, tank status, or embedded logic |
| Wiring check | A haapapû i te VCC, GND, and signal line before powering the sensor |
The NPN open-collector output is especially important. It is not the same as a push-pull output. In many MCU circuits, the output line needs a pull-up to the controller’s logic voltage. When the sensor switches, the output transistor pulls the signal line low or releases it, depending on the wet/dry state and circuit design. Hou a poro'i ai, buyers should confirm the expected output logic with the control board firmware.
For a hands-on microcontroller wiring explanation, use our Arduino optical sensor guide. This product page focuses on specification selection, not Arduino programming.
How the Infrared Optical Tip Detects Water
The sensing principle uses an infrared LED, a phototransistor receiver, and a transparent optical prism tip. I roto i te mǎrô, E anaana te maramarama infrarouge i roto i te prisma e e ho'i atu i roto i te prisma. Ia rari ana'e te prisma i te pape, E taui te huru o te refractive, no reira, e iti mai te maramarama e ho'i mai i ni'a i te taata farii. The circuit converts that optical change into an electrical output.
This is why optical sensors are different from float switches. There is no magnet, Reed Switch, tuati, or moving float. The sensor responds to the optical condition at the tip. That makes it useful in compact tanks, narrow spaces, and equipment where a moving float could jam, raau, or become noisy.
Tera râ,, the buyer must check the detection liquid. Clean water is the most common target for this 5V module, but real-world liquids can behave differently. Foam, Te mau hu'ahu'a, heavy scaling, thick oil films, Te mau nota, or sticky residue on the optical tip may delay or disturb detection. If the liquid is not clean water, share the medium name, huru anuvera, rave'a tamâraa, and whether residue is expected.
Te mau nota, Housing Material and Mounting Choices
Compact 5V optical water level modules are often used where space is limited. Dimensions should be confirmed from the product drawing before purchase because tank wall thickness, Te roa o te taura, te avei'a no te faaru'eraa i te, and sealing area all affect installation.
HojellyTek can support optical sensor structures for different OEM projects, including plastic-bodied modules, compact sensor heads, e te mau faanahoraa niuniu taa ê. For very tight equipment layouts, E nehenehe atoa ta te feia hoo e hi'o i ta matou Micro Optical Sensor Te mau nota.
Common wetted-material choices include:
- Te mau fare PSU for general water and appliance applications
- PTFE body for chemically aggressive liquid environments
- 316 Fare auri stainless for stronger mechanical protection or industrial tanks
- Glass sensing tip for selected high-cleanliness or special media requirements
Material selection should follow the liquid, cleaning chemical, Te anuvera, Te teimaha o te matini, e te rave'a no te taati. A low-current 5V electrical design does not automatically mean the same housing works for every liquid.
Panel and Inline Mounting Notes
Panel mounting is the most common approach. The sensor tip passes through a tank wall or panel opening, and the optical tip is positioned at the required level point. The buyer should confirm:
- Sensor tip direction
- Te meumeu o te papa'i o te vairaa
- Thread or locking-nut requirement
- Seal position
- Te arata'iraa no te faaru'eraa i te niuniu
- E tuuhia anei te matini i roto aore ra i rapae i te farii
- Whether the liquid level rises slowly, splashes, or creates foam near the sensing point
Inline mounting is different. Instead of being mounted directly into a tank wall, the sensor may be placed in a small liquid path, Tube, chamber, or transparent/opaque flow section. For inline use, the buyer should provide a drawing of the fluid path so the factory can review whether the optical tip will be fully exposed to the liquid and whether trapped air bubbles may affect detection.
Quick-Test Checklist Before Production Use
Before moving to batch production, test the module with the real control board and real liquid condition.
- Confirm power first
Supply the sensor with stable 5V DC and verify the current draw is suitable for the controller power budget. - Check wiring order
A haapapû i te VCC, GND, and NPN signal output before connection. Incorrect wiring can damage the module or create false output. - Verify output logic
Test dry state and wetted state with a multimeter or MCU input. Confirm whether the firmware expects active-low or active-high behavior. - Test the actual liquid
Do not rely only on clean water if the final product uses detergent, pape toetoe, oil-water mixture, rave'a chimique, or liquid with residue. - Test mounting position
Install the sensor in the real tank wall or chamber position. Check splashing, Te mau hu'ahu'a, Te mau nota, and whether the optical tip is fully exposed. - Run repeated wet/dry cycles
Cycle the liquid level multiple times to confirm repeatability before approving the sensor for production.
5-Step OEM Supply Process
- Uiuiraa
A hapono i te pape i tapaohia, uira uira, Te huru o te ohipa, Rave'a no te haamauraa, cable length preference, e te mau hoho'a e aore râ te mau hoho'a. - Hi'opo'araa i te mau hoho'a e te faatanoraa
Our team confirms the 5V, approximately 15mA, NPN open-collector requirement and reviews housing material, tu'atiraa, tapa'opa'oraa, e te mau faaheporaa no te haamauraa. - Hi'oraa haapapûraa
Sample units can be prepared for electrical, Te mau mana'o tauturu no te, and mechanical fit testing before batch approval. - Te hamaniraa e te QC
The factory checks electrical function, pahonoraa mata, Te mau mana'o tauturu no te, housing condition, e te faanahoraa taa ê no te hoani. - Export and shipping support
HojellyTek exports optical liquid level sensors to US, MATOU, Inidia, and other markets with support by WhatsApp and email.
Ordering Requirements to Share With the Factory
To quote the correct version, send these details:
| Titauraa | No te aha mea faufaa ' i |
|---|---|
| Huru pape | Confirms optical detection reliability and wetted material |
| Te uira o te uira | This page focuses on 5V DC modules |
| Current budget | Confirms suitability for approximately 15mA sensor draw |
| Titauraa no te hamaniraa | NPN open collector is standard for this selection; PNP or 4–20 mA can be reviewed for other projects |
| Te huru o te tamauraa | Panel, tank wall, chamber, or inline installation |
| Te mau tauihaa no te fare | PSU, PTFE, 316 auri auri, or glass options depend on the liquid |
| Te niuniu / tu'atiraa | Needed for OEM assembly and serviceability |
| Controller type | MCU, PLC input board, Module IoT, or appliance control PCB |
5V vs 12V vs Micro Optical Sensor Options
| Rave'a | Te mea maitai a'e no te | Nota no te taata hoo |
|---|---|---|
| 5V low-current optical module | MCU boards, Te mau mana'o tauturu no te, compact water detection | Choose when 5V supply and direct digital input are preferred |
| 12Matini hi'opo'a V | Industrial controls and 12V systems | Better when the control cabinet or machine already uses 12V power |
| Micro optical sensor | Very small reservoirs and tight OEM layouts | Review drawing and mounting depth carefully |
| 316 Stainless / PTFE versions | Industrial or chemical liquid projects | Select based on liquid compatibility and mechanical environment |
No te aha e ma'iti ai i te HojellyTek
HojellyTek o te hoê ïa taiete hamani e te hoo tao'a no Shenzhen tei faatumuhia i ni'a i te hi'opo'araa i te faito o te pape hi'opo'a uira. Ta matou R i roto i te fare&D team supports sensor structure selection, Faatanoraa OEM/ODM, cable and connector matching, e te hi'opo'araa i te mau aniraa no te pape, matini, Te mau mana'o tauturu no te, and industrial liquid detection projects.
Buyers work with us when they need factory-direct support instead of only a generic module listing. We help confirm the electrical interface, tu'atiraa i te pape, mounting approach, and production test requirements before the order is finalized.
FAQ
Is the 15ma 5v optical infrared water liquid level sensor a continuous level sensor?
Aita. It is a point-level sensor. It detects whether liquid is present at the optical tip position. For continuous tank height measurement, a different sensor structure is required.
Can the 5V optical water level sensor connect directly to an MCU?
E, when the MCU input circuit is designed for an NPN open-collector signal with the correct pull-up and logic expectation. Always test wet and dry output states before production.
What liquid can this optical infrared sensor detect?
Clean water is the most common target. Other liquids should be tested because foam, toe'a, hoho'a hinu, Te mau hu'ahu'a, or heavy contamination can affect the optical tip response.
Does the sensor need a relay?
Not for most MCU input designs. The NPN open-collector output is normally used as a digital signal input. A relay is only needed if the wider control system requires one.
Can I order a different output type?
E. This page focuses on the 5V, approximately 15mA, NPN open-collector module. For PNP, faahoho'araa, 4–20 mA, or other interface needs, send your controller specification for review.
Can this sensor be used for inline mounting?
E, inline use can be reviewed if the liquid path allows the optical tip to contact the liquid properly. Send the chamber, Tube, or flow-path drawing before ordering.
A ani i te hoê faahitiraa parau
A hapono i ta outou huru pape, 5V controller details, output logic requirement, hoho'a no te haamauraa, cable or connector preference, e te rahiraa poro'i i mana'ohia. HojellyTek can review the specification and provide a suitable low-current 5V optical infrared water level sensor quotation by WhatsApp or email.
