Guiyang.bai@honno-auto. com
86-13840589744
Combined level and temperature switch for oil/water tanks: float plus Pt100 or K-type thermocouple; brass 20 bar / SS304 60 bar, G1 thread or flange, IP65; one or two level points; temperature switch / Pt100 / K-type selectable.
The HNL10-B is a combined level and temperature switch for small oil and water tanks. A control rod with one or two float switch points also carries an optional integrated temperature element, so a single instrument measures level and temperature through one tank opening — reducing fittings and potential leak points. The temperature channel can be a switch, a two-wire Pt100 or a K-type thermocouple, selected to match your control or monitoring circuit.
The HNL10-B suits hydraulic power units and reservoirs, compressor and gearbox oil tanks, machine-tool coolant and lubricant tanks, chiller and cooling-water tanks, heating and boiler feed tanks, transformer and generator oil tanks, marine and vehicle fluid tanks, and process utility tanks where one opening must serve both level and temperature. Brass or stainless-steel wetted construction, G1 thread or flange mounting, DIN 43650 plug or M12×1 aviation plug.
Good fit: small oil/water tank level and temperature detection, hydraulic power units and reservoirs, compressor and gearbox oil tanks, machine-tool coolant and lubricant tanks, hydraulic oil temperature monitoring, industrial chiller and cooling water tanks, heating and boiler feed tanks, transformer and generator oil tanks, marine and vehicle fluid tanks, chemical and process utility tanks, OEM combined level-and-temperature instrumentation, plant where one tank opening must serve two measurements.
Choose HNL10-B when:
You need level switching plus oil or water temperature monitoring from one probe through one tank opening.
Pressure is within 20 bar for the brass body or 60 bar for the stainless-steel 304 body, and temperature is within the 105 °C rated resistance.
You need one or two level switch points, with the temperature channel as a switch, Pt100 or K-type thermocouple.
Confirm with us first when: you need a continuous 4–20 mA level loop, the medium is strongly corrosive, pressure exceeds the body rating, or the tank already has separate level and temperature instruments.
One or two floats actuate the sealed reed contacts at set rod positions. The first point L=XX mm and second point L1=XX mm are specified in millimetres. Each point can be normally open (high closed) or normally closed (high disconnect); a single point can also be ordered as NO+NC.
1 level switch + 1 temperature switch
2 level switches + 1 temperature switch
1 level channel + two-wire Pt100
1 level channel + K-type thermocouple
A no-temperature version is also available when level switching alone is required.
Flange or G1 threaded connection; DIN 43650 (ISO 4400) industrial plug as standard, M12×1 aviation plug optional; IP65 enclosure; contact rating 70 V / 0.75 A. Brass body rated 20 bar, stainless-steel 304 body rated 60 bar.
| Model | HNL10-B — Combined liquid level and temperature switch |
|---|---|
| Principle | Float reed level switch points on a control rod; optional integrated temperature switch, Pt100 or K-type thermocouple |
| Level switch points | 1 or 2 points; first point L=XX mm, second point L1=XX mm (ordering dimension) |
| Temperature channel | Temperature switch (NO/NC), two-wire Pt100, or K-type thermocouple; no-temperature version available |
| Temperature resistance | Up to 105 °C |
| Protection class | IP65 |
| Contact rating | 70 V / 0.75 A |
| Body material / pressure | Yellow brass: 20 bar; stainless steel 304: 60 bar |
| Connection | G1 thread or flange |
| Electrical plug | DIN 43650 (ISO 4400) standard; M12×1 aviation plug optional |
| Measured media | Oil and water in hydraulic, lubrication, cooling and utility tanks |
| Code segment | Code | Description |
|---|---|---|
| First switch point L=XX mm | NO | L normally open output (high closed) |
| NC | L normally closed output (high disconnect) | |
| R | NO + NC (single switch point only) | |
| Second switch point L1=XX mm | NO | L1 normally open output (high closed) |
| NC | L1 normally closed output (high disconnect) | |
| Omit the second-point option when two switch points are not required. | ||
| Body material | T | Yellow brass |
| S | Stainless steel 304 | |
| Installation method | C | Threaded installation, G1 |
| D | Flange installation | |
| Plug connection | B | Hessman plug DIN 43650 |
| M | M12×1 aviation plug | |
| Output | P | Two-wire Pt100 output |
| K | K-type thermocouple output | |
| NO | Temperature normally open output | |
| NC | Temperature normally closed output | |
| No-temperature-protection version available on request. | ||
Rod-mounted float switch with DIN 43650 head or threaded hex fitting; rod length L and switch-point positions L / L1 are specified on order. Overall dimensions follow the selected connection and body material.
1 level switch + 1 temperature switch: level NO/NC contact and temperature NO/NC contact with common terminal.
2 level switches + 1 temperature switch: L1, L and T contacts through separate terminals.
1 level channel + Pt100: level NO/NC contact plus two-wire Pt100 resistance output.
1 level channel + K-type: level NO/NC contact plus K-type thermocouple mV output.
Mount through the G1 thread or flange so the float travels freely along the rod without touching the tank wall, suction strainer or internal baffle. In viscous oil, keep the float path clear of sludge and buildup. Route the DIN 43650 or M12 cable away from hot surfaces and moving parts, and seal the plug against moisture. Confirm whether each level contact should close on rising level or on falling level before selecting NO or NC.
Hydraulic and lubrication: power-unit reservoirs, pump suction protection and oil-temperature monitoring.
Compressors and gearboxes: oil-level and temperature switching in sealed sumps.
Cooling and heating: chiller tanks, cooling-water reservoirs and boiler feed tanks.
Mobile and OEM: transformer/generator oil tanks, marine and vehicle fluid tanks, packaged equipment combined instrumentation.
Send: medium and operating temperature, working pressure, tank size and available opening (thread or flange), required level point positions L and L1, temperature channel preference (switch / Pt100 / K-type), body material, and plug type. We will confirm the configuration and selection code before quoting.
Can one probe monitor level and temperature?
Yes. The HNL10-B carries level contacts and an integrated temperature channel through one rod and one tank opening, suitable for hydraulic and process tanks where a second fitting is not available.
How do dual float points support low-level shutdown and high-level overflow protection?
Set the first point at the minimum safe level for pump dry-run or low-level shutdown, and the second point L1 at the high level for overflow alarm. Choose NO or NC for each point to match the safety logic of your circuit.
Should brass or stainless steel contact hot hydraulic oil?
Brass suits general water and hydraulic oil up to 20 bar; stainless steel 304 is chosen for higher pressure (60 bar) or media that brass is not compatible with. Send the oil type, temperature and pressure so we match the body material.
Can a Pt100 output share one tank opening with level contacts?
Yes. The 1 level channel + Pt100 configuration combines a level NO/NC contact with a two-wire Pt100 resistance signal in one probe; the K-type version provides thermocouple mV output instead.
What checks prevent floats from sticking in viscous oil?
Verify the float slides freely after installation, keep the rod clear of sludge and residue, and inspect periodically in heavy oil service. Avoid mounting where settled sludge or waxing deposits collect around the float.
Send us the medium, pressure, temperature, opening type and required level points. We will confirm the body, configuration 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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