Guiyang.bai@honno-auto. com
86-13840589744
Magnetostrictive level sensor with PFA body and rod for acids and alkalis; 0.05/0.1 mm resolution, 25–2500 mm, 4–20 mA / RS485, M50 thread or flange, IP67.
The HNL30-B is a magnetostrictive level sensor with a PFA shell and PFA sensor rod, selected for strong acid and alkali service where stainless-steel sensors do not hold up. A built-in magnet float tracks the level; resolution is 0.05 / 0.1 mm, with current, voltage or RS485 communication interfaces to match the control system.
The sensor suits strong acid and alkali media, chemical dosing and storage tanks, chemical and petrochemical process vessels, electroplating and surface-treatment baths, pharmaceutical and fine-chemical tanks, water and wastewater chemical tanks, semiconductor wet-process chemical lines, high-precision level measurement in small tanks, corrosive liquid storage, narrow tanks and columns, laboratory and pilot-plant vessels, and OEM equipment for aggressive media.
Good fit: strong acid and alkali media, chemical dosing and storage tanks, chemical and petrochemical process vessels, electroplating and surface treatment baths, pharmaceutical and fine chemical tanks, water and wastewater chemical tanks, semiconductor wet-process chemical lines, high-precision level measurement in small tanks, corrosive liquid storage, level measurement in narrow tanks and columns, laboratory and pilot plant vessels, OEM equipment for aggressive media.
Choose HNL30-B when:
The medium is acidic or alkaline and stainless-steel construction is not compatible.
You need continuous, high-resolution level measurement (0.05 / 0.1 mm) in a chemical or process vessel.
Range is within 25…2500 mm, and the control system accepts 4…20 mA, voltage output or RS485.
Confirm with us first when: the medium contains heavy solids or sludge that can bind the float, the level range exceeds 2500 mm, the tank is pressurized beyond the connection rating, or you need a certified explosion-proof instrument.
A float with a built-in magnet rides the PFA rod; the magnetostrictive element measures the float position. Non-linearity ±0.1 mm (≤400 mm) or 0.05% F.S. (>400 mm); repeatability ±0.1 mm; update time 1 ms (four-wire) or 100 ms (two-wire). The magnetic ring speed is optional.
The electronics compartment and sensor rod are PFA, with a PFA float ball and PFA plug, resisting strong acid and alkali. The float position is measured by the built-in magnet; upper and lower blind spots vary slightly with liquid density.
Output 4…20 mA or 20…4 mA (load 0/500 Ω), 0–10 VDC or 0–5 VDC (minimum load ≥10 kΩ), or RS485. M12 aviation socket connection; M50 thread or movable threadless flange mounting, any orientation. IP67, operating temperature –40…+75 °C, humidity 90% non-condensing.
| Model | HNL30-B — PFA anti-corrosion magnetostrictive liquid level sensor |
|---|---|
| Measuring principle | Magnetostrictive element with built-in magnet float; continuous level position |
| Measuring range | 25…2500 mm, customized to requirement |
| Resolution | ±0.1 mm (range ≤400 mm); range ÷ 4096 (range >400 mm); 0.05 / 0.1 mm resolution |
| Non-linearity | ±0.1 mm (≤400 mm) or 0.05% F.S. (>400 mm) |
| Repeatability | ±0.1 mm |
| Update time | 1 ms (four-wire) / 100 ms (two-wire) |
| Current output | 4…20 mA or 20…4 mA; minimum / maximum load 0 / 500 Ω |
| Voltage output | 0–10 VDC or 0–5 VDC; minimum load resistance ≥10 kΩ |
| Input voltage | +24 VDC ±20% or +12 VDC ±20% |
| Power consumption | <80 mA |
| Protection | Polarity protection max –30 VDC; overvoltage protection max 36 VDC; insulation resistance >10 MΩ; dielectric strength 500 V |
| Wetted / construction | PFA electronics compartment, PFA sensor rod, PFA float ball and PFA plug; float with built-in magnet |
| Connection | Aviation socket, M12 connector |
| Mounting | Any direction; M50 thread or movable threadless flange |
| Protection rating | IP67 |
| Operating temperature | –40 °C to +75 °C |
| Humidity | 90% non-condensing |
| Shock / vibration | 50 g, 6 ms (GB/T 2423.5); 15 g, 10…2000 Hz (GB/T 2423.10) |
| EMC | ESD, RF radiated, EFT, conducted RF and power-frequency magnetic field immunity per GB/T 17626 series, Levels 2–3 |
| Pin | Color | Function |
|---|---|---|
| 1 | Brown | +24 VDC ±20% power supply |
| 2 | White | 0 V power circuit |
| 3 | Blue | Signal + |
| 4 | Black | Signal − |
| 5 | Grey | Shielding wire |
| Code segment | Code | Description |
|---|---|---|
| Measuring range | – | L = xx mm (four digits, leading zeros) |
| Temperature measurement | 1 | Yes |
| 2 | No | |
| Installation | F | Threadless flange installation (M50 thread otherwise) |
| Cable length | – | Two digits, leading zeros; 05 = 5 m |
| Output signal | M | Current output 4…20 mA |
| R | RS485 |
Rod-mounted PFA sensor with M12×1 head, PFA float ball and PFA measuring rod. Upper blind spot varies with liquid density; a lower blind spot is noted on the drawing. Rod length matches the ordered range.
Mount through the M50 thread or threadless flange so the float travels freely along the rod, clear of the tank wall, heating element and internal fittings. Keep the rod vertical or within the allowed mounting orientation. In aggressive media, confirm the PFA wetted parts are compatible with concentration and temperature. Route the M12 cable away from vibration and high-temperature surfaces, and connect the grey shield to protective earth per the system layout.
Chemical dosing and storage: acid/alkali tank high-precision level and control.
Surface treatment: electroplating and etching baths, fine-chemical and pharmaceutical vessels.
Water and wastewater: chemical dosing tanks and corrosive process water.
Precision and OEM: narrow columns, pilot vessels, semiconductor wet lines and aggressive-media OEM equipment.
Send: medium, concentration and temperature, tank material and available opening, required range, output preference (4…20 mA / voltage / RS485), whether temperature measurement is required, cable length, and control-system input. We will confirm the mounting and selection code before quoting.
Can PFA withstand strong acids and alkalis?
The PFA shell and rod are selected for strong acid and alkali service where stainless steel is not compatible. Confirm the exact chemical, concentration and temperature with us so the PFA wetted parts are matched to the medium.
How accurately does magnetostrictive sensing track continuous chemical tank level without contact wear?
The magnetostrictive element tracks the magnetic float with ±0.1 mm non-linearity and ±0.1 mm repeatability; there is no sliding electrical contact to wear out, which suits continuous level duty in chemical tanks.
Does surface foam interfere with the magnetic float position?
The measurement responds to the magnet float position, so stable foam above the liquid generally does not shift the reading. Heavy foam, sludge or coating that restrains the float should be avoided; keep the float path clear.
Which output best supports remote dosing tank level control?
4…20 mA is the standard choice for remote analog level control over longer lines; RS485 suits multi-drop digital monitoring; 0–10 V / 0–5 V suits local analog controllers. Match the load to the stated minimum load resistance.
What mounting clearance prevents the float contacting tank internals?
Leave clearance around the rod so the float does not touch the wall, heating element, baffle or fittings, and account for the upper and lower blind spots when setting the readable level range.
Send us the chemical, concentration, range and opening. We will confirm the output and selection code before we quote.
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Contact: HongNuo
Phone: 13840589744
Tel: 86-13840589744
Email: Guiyang.bai@honno-auto. com
Add: Zhongguancun Innovation Center, No. 28 Huahai Road, Shenyang Economic and Technological Development Zone, Liaoning Province
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