Winsen supplies low-range differential pressure (ΔP) sensors engineered for HVAC, cleanrooms, filter monitoring, VAV boxes, fume hoods, and process diagnostics. Our MEMS piezoresistive and capacitive cores deliver stable, low-noise readings from ±25 Pa up to ±100 kPa with analog (4–20 mA, 0–10 V, 0.5–4.5 V) and digital (I²C/SPI) outputs.
OEM/ODM • Zasebno označevanje • Hiter dobavni rok- ±25 Pa → ±100 kPa bidirectional ranges
- ±0.25%FS typ. accuracy options
- 0–10 V / 4–20 mA / I²C easy integration
- Zero/Span field calibration
Overview & Working Principle
A differential pressure sensor measures the pressure difference between two ports (High/Low). Winsen integrates a sensitive MEMS diaphragm, precision resistive/ASIC conditioning, and temperature compensation to output a linear signal proportional to ΔP. Bidirectional designs track positive and negative room pressure with the same device.
For air and non-condensing gases, barbed ports accept 4–6 mm tubing for fast installation. For liquid service, we provide isolated and corrosion-resistant interfaces. Choose ratiometric or I²C for embedded devices, or 4–20 mA/0–10 V for long cables and industrial PLCs.
Pregled primerjave senzorja tlaka in oddajnika
| Kategorija | Model | Napajanje/izhod | Območje odkrivanja | Natančnost/nelinearnost | Referenca pritiska | Delovna temperatura | Material lupine | Opombe |
| Razpršen senzor tlaka silicija | WPAK70 | 1,5 mA / mV | -100kPa ~ 0 ~ 10kPa…10MPa | ≤ ± 0,3%fs | Merilnik / absolutni / zaprti merilnik | -40 ℃ ~ 120 ℃ | – | Visoka vsestranskost, kompakten dizajn |
| WPAK69 | 1,5 mA / mV | -100kPa ~ 0 ~ 10kPa…10MPa | ≤ ± 0,3%fs | Merilnik / absolutni / zaprti merilnik | -40 ℃ ~ 120 ℃ | – | Podobno kot WPAK70 | |
| WPAK68 | 1,5 mA / mV | -100kPa ~ 0 ~ 10kPa…100MPa | ≤ ± 0,3%fs | Merilnik / absolutni / zaprti merilnik | -40 ℃ ~ 120 ℃ | – | Različica z razširjenim dosegom | |
| WPAK67 | 1,5 mA / mV | 0 ~ 10kPa…2,5MPa | ≤ ± 0,3%fs | Diferencialni tlak | -40 ℃ ~ 120 ℃ | – | Za diferencialne aplikacije | |
| WPAK66 | 1,5 mA ali 10 V / mV | 6MPA… 60MPA | ≤ ± 0,3%fs | Zapečaten merilnik | -40 ℃ ~ 120 ℃ | – | Zaprta zasnova za višje razpone | |
| Wpek65 | 1,5 mA ali 10 V / mV | -100kPa ~ 0 ~ 10kPa…16MPa | ≤ ± 0,3%fs | Merilnik / absolutni / zaprti merilnik | -40 ℃ ~ 120 ℃ | – | Senzor za splošno uporabo | |
| WPAK64 | 1,5 mA ali 10 V / mV | -100kPa ~ 0 ~ 10kPa…25MPa | ≤ ± 0,3%fs | Merilnik / absolutni / zaprti merilnik | -40 ℃ ~ 120 ℃ | – | Zmerna pokritost | |
| Wopak63j | 1,5 mA / mV | -100kPa ~ 0 ~ 10kPa…100MPa | ≤ ± 0,3%fs | Merilnik / absolutni / zaprti merilnik | -40 ℃ ~ 120 ℃ | – | Različica tipa J za posebno montažo | |
| WPAK63 | 1,5 mA ali 10 V / mV | -100kPa ~ 0 ~ 10kPa…100MPa | ≤ ± 0,3%fs | Merilnik / absolutni / zaprti merilnik | -40 ℃ ~ 120 ℃ | – | Vsestranski s širokim razponom | |
| Senzor keramičnega tlaka | WPAH01 | 2–20 V / mV | 0 ~ 200kPa…40MPa | ≤ ± 0,3%fs | – | -40 ℃ ~ 125 ℃ | – | Visoka kemična odpornost |
| Plastični zatesnjeni tlačni senzor | WPAS12 | Digitalni in analogni | 15–115 kPa | – | – | -40 ℃ ~ 125 ℃ | – | Stroškovno učinkovit, kompakten |
| WPAS02 | Digitalni in analogni | 10kPa ~ 100kPa | – | – | -20 ℃ ~ 80 ℃ | – | Osnovni senzor za zrak/plin | |
| WPAS01 | Digitalni in analogni | 10kPa ~ 100kPa | – | – | -40 ℃ ~ 125 ℃ | – | Robustna toleranca na visoke temperature | |
| Razpršeni oddajnik silicijevega tlaka | WPCK81 | 4–20 mA, RS485 | 0 ~ 1m…200mH₂O | ±0,5% FS / ±1% FS | Tlak merilnika | – | Nerjaveče jeklo | Za meritve globine in nivoja rezervoarja |
| WPCK62 | 4–20 mA (izbirno) | 0 ~35kPa…25MPa | ± 0,5%fs | Merilnik / absolutni / zaprti merilnik | – | Nerjaveče jeklo | Široko združljive možnosti niti | |
| WPCK08 | 4–20 mA, RS485 | 0 ~ 200 mH₂O | ± 0,5%fs | Tlak merilnika | – | Nerjaveče jeklo | Eksplozijsko varna različica | |
| WPCK07 | 4–20 mA, 0,5–4,5 V, 0–5 V, 1–5 V, 0–10 V, 1–10 V | -100kPa ~ 0 ~ 10kPa…100MPa | ± 0,5%fs | Merilnik / absolutni / zaprti merilnik | – | Nerjaveče jeklo | Izhodne vrste celotnega obsega | |
| WPCK05 | 0.5–4,5 V, 0–5 V, 1–5 V, 0–10 V, 1–10 V | -100kPa ~ 0 ~ 10kPa…100MPa | ± 0,5%fs | Merilnik / absolutni / zaprti merilnik | – | Nerjaveče jeklo | Možnosti izhodne napetosti | |
| WPCK03 | I²C, 4–20 mA, 0,5–4,5 V in več | -100kPa ~ 0 ~ 10kPa…100MPa | ±0,2 %FS, ±0,5 %FS (po meri) | Merilnik / absolutni / zaprti merilnik | – | Nerjaveče jeklo | Prilagodljivi tipi signalov, visoka natančnost | |
| Oddajnik keramičnega tlaka | WPCH04 | 0.5–4,5 V (prilagodljivo) | 0.2MPa…40MPa | 0.1%FS (privzeto) | – | – | Nerjaveče jeklo | Visoko natančno keramično jedro |
| WPCH01 | 4–20 mA, 0/1–5/10 V, 0,5–4,5 V | 0.2–5MPa | 0.1% ~ 5,0% FS (privzeto 2,0%) | – | – | Nerjaveče jeklo | Prilagodljivi, vsestranski izhodi | |
| WPBH01 | Proporcionalna napetost (0,5–4,5 V) | 2–400 barov (prilagodljivo) | 0.5%, 1%, 2% (privzeto), 3% | – | – | Nerjaveče jeklo | Širok razpon tlaka | |
| Stekleni oddajnik z mikrotaljenjem | WPCK89 | Digitalni in analogni | 0 ~ 100 / 150 / 250 / 500 psig | ±1 % FS | – | – | Nerjaveče jeklo | Izjemno robusten in termično stabilen |
Vodnik za izbiro
Use the matrix below to choose the right ΔP sensor. Our team will finalize calibration after reviewing your environment and tubing layout.
| Primer uporabe | Priporočeno območje | Mediji | Prednostni izhod | Ports & Connections | Opombe |
|---|---|---|---|---|---|
| Cleanroom pressurization | ±25 to ±250 Pa | Air | 0–10 V or I²C | Barbed 4–6 mm; JST/Molex | Enable averaging filter to reduce door-opening spikes. |
| Filter status (AHU) | ±250 Pa to ±2 kPa | Air | 4–20 mA | Barbed ports; M12/DIN via harness | Use 4–20 mA for long runs and noise immunity. |
| VAV & duct measurement | ±50 Pa to ±1 kPa | Air | 0.5–4.5 V ratiometric | Board-level or compact module | Pair with a Pitot or flow element for airflow calculation. |
| Fume hood face velocity | ±50 Pa to ±500 Pa | Air | 0–10 V / I²C | Barbed ports; shielded cable | Enable offset auto-zero on power-up. |
| Process orifice/flow | ±2 kPa to ±100 kPa | Gas/Liquid | 4–20 mA | Isolated diaphragm adapters | Check liquid compatibility and maximum static pressure. |
Applications & Industries
HVAC & Building Controls
Room pressurization, isolation rooms, VAV, AHU filter status, stairwell pressurization, duct airflow.
Healthcare & Cleanrooms
Monitor positive/negative pressure differentials and air changes per hour for GMP environments.
Laboratory Safety
Fume hood face velocity control and sash interlocks using stable low-Pa sensors.
Process & Utilities
Orifice and filter ΔP in gas/liquid skids, blower monitoring, burner air control, leak detection.
Instruments & IoT
Portable analyzers, smart thermostats, and data loggers with low-power digital outputs.
Education & R&D
Wind tunnels, flow benches, and environmental test rigs requiring fast dynamic response.
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Zahtevajte posvetovanje
Ključne specifikacije
| Measurement | Bidirectional differential (High–Low) or unidirectional |
|---|---|
| Ranges | ±25 Pa → ±100 kPa; custom ranges on request |
| Izhodi | 4–20 mA (2-wire), 0–10 V / 0–5 V, 0.5–4.5 V ratiometric, I²C/SPI |
| Accuracy (typ.) | ±0.25%FS (options; model & range dependent) |
| Stabilnost | ±0.2%FS/yr typical |
| Odzivni čas | 2–10 ms (digital filtering configurable) |
| Compensated Temp. | −10 to 85 °C (options wider) |
| Delovna temp. | −20 to 85 °C air; consult liquid models |
| Overload / Burst | 2× / 5× FS typical (per model) |
| Ports | Barbed 4–6 mm, M5, 1/8-NPT, manifold or custom |
| Električni | JST/Molex, cable pigtail, M12 via harness, custom headers |
| Protection | Reverse polarity; optional hydrophobic filter; IP-rated housings via transmitter |
Quality & Compliance
- 100% functional test and temperature compensation per specified span
- NIST-traceable calibration equipment; serialized labels for traceability
- Optional hydrophobic filters and splash guards for humid environments
- Datasheet and test report supplied with standard builds
Ordering & Bulk Purchasing
Kako določiti
- Range & units (e.g., ±50 Pa, ±500 Pa, ±2 kPa, ±100 kPa)
- Output (4–20 mA, 0–10 V, 0.5–4.5 V, I²C/SPI)
- Port style (barbed size, M5, 1/8-NPT, manifold)
- Connector (JST, Molex, cable pigtail, M12 via harness)
- Environment (temperature, humidity/condensation, vibration)
- Calibration (zero/span, multi-point, filter constants)
Pogoji programa
- Samples for DFM and validation
- Stopenjsko določanje cen za razporede količin
- Zasebno označevanje in pakiranje po meri
- Tekoče napovedi z možnostmi varnostnih delnic
Senzor diferenčnega tlaka proti pretvorniku proti oddajniku
| Naprava | Izhod | Tipična uporaba | Pros | Premisleki |
|---|---|---|---|---|
| Senzor ΔP (plošča/kompakt) | Raciometrični / I²C / SPI | Vgrajene naprave, instrumenti | Majhna, nizka poraba energije, stroškovno učinkovita | Zahteva gostiteljsko elektroniko in ohišje |
| ΔP pretvornik | 0–10 V / 4–20 mA | Merjenje PLC/DAQ | Preprosto ožičenje, dolgi kabli | Zunanji zaslon/releji niso vključeni |
| ΔP oddajnik | Kondicionirano + ohišje (pogosto zaslon/releji) | Montaža na terenu, montaža na panel | Robusten, monterju prijazen | Največja velikost in najvišji stroški |
Niste prepričani, katero izbrati? Delite svoj model krmilnika in mesto namestitve – priporočili vam bomo pravi paket.
Pogosto zastavljena vprašanja (FAQ)
How do I convert differential pressure to airflow?
Use a flow element (Pitot tube/orifice) with a K-factor. Airflow ≈ K × √(ΔP/ρ). We can provide guidance on K-factor selection and sensor range.
How do I avoid zero drift from tubing orientation?
Mount ports horizontally where possible, use equal-length tubing, enable warm-up, and perform a zero with both ports open to ambient.
Can I measure slightly humid air?
Yes—use a hydrophobic vent/filter and route tubing to minimize condensate. For condensing or liquid service, choose our isolated designs.
What is the recommended cable for long runs?
For analog outputs, use shielded twisted pair; ground the shield at one end. For I²C/SPI, keep leads short or use differential transceivers.
Do you supply matched pairs for redundancy?
Yes. We can provide matched sensors with correlated calibration data and common labels for critical applications.
