Differential Pressure Transducer | Low-Range ΔP for HVAC & Cleanrooms | Winsen
Winsen supplies low-range differential pressure (ΔP) transducers designed for HVAC, cleanrooms, filter status, fume hoods, VAV boxes, and process diagnostics. Built on a stable MEMS core with precision temperature compensation, our ΔP devices deliver linear, low-noise signals via 4–20 mA, 0–10 V, ratiometric 0.5–4.5 V, or I²C outputs.
OEM/ODM • Zasebno označevanje • Hiter dobavni rok
- ±25 Pa → ±100 kPa bidirectional ranges
- ±0.25%FS typ. accuracy options
- 4–20 mA / 0–10 V / I²C easy integration
- Zero/Span field calibration
Overview & Working Principle
A differential pressure transducer measures the pressure difference between two ports (High/Low). The sensing diaphragm deflects with ΔP, and the signal-conditioning ASIC converts it into a calibrated electrical signal. Bidirectional variants read both positive and negative pressure relative to the low port—ideal for room pressurization and airflow elements.
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
| Primer uporabe | Priporočeno območje | Prednostni izhod | Ports & Electrical | Opombe |
|---|---|---|---|---|
| Cleanroom pressurization | ±25…±250 Pa | 0–10 V or I²C | Barbed 4–6 mm; JST/Molex | Enable averaging to reduce door-opening spikes. |
| Filter status (AHU) | ±250 Pa…±2 kPa | 4–20 mA | Barbed ports; M12/DIN via harness | Best for long runs and noisy plant rooms. |
| VAV & duct airflow | ±50 Pa…±1 kPa | 0.5–4.5 V or I²C | Board-level or compact module | Pair with flow element; use median filtering. |
| Fume hood face velocity | ±50…±500 Pa | 0–10 V | Barbed; shielded cable | Auto-zero at start with both ports to ambient. |
| Process orifice/flow | ±2…±100 kPa | 4–20 mA | Isolated adapters available | Check static pressure and media compatibility. |
Need RS-485/Modbus or a display? Choose the transmitter package or request a custom electronics stack.
Ključne specifikacije
| Measurement | Bidirectional differential (High–Low) or unidirectional |
|---|---|
| Ranges | ±25 Pa → ±100 kPa (custom on request) |
| Izhodi | 4–20 mA (2-wire), 0–10 V / 0–5 V, 0.5–4.5 V ratiometric, I²C |
| Accuracy (typ.) | ±0.25%FS (options per range) |
| Stabilnost | ±0.2%FS/year typical |
| Response | 2–10 ms (digital filtering configurable) |
| Comp. Temp | −10…85 °C (options wider) |
| Delovna temperatura | −20…85 °C air (consult liquid models) |
| Overload / Burst | 2× / 5× FS typical (per model) |
| Ports | Barbed 4–6 mm, M5, 1/8-NPT, manifold/custom |
| Električni | JST/Molex headers, cable pigtail, M12 via harness |
| Protection | Reverse polarity; optional hydrophobic filter; IP-rated housings via transmitter |
Applications & Industries
HVAC & Building Controls
Room pressurization (positive/negative), stairwell pressurization, AHU filter status, VAV control.
Healthcare & Cleanrooms
ISO/GMP suites and isolation rooms with continuous ΔP monitoring and alarm relays.
Process & Instruments
Orifice ΔP for flow, blower monitoring, burner air control, leak and blockage diagnostics.
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Integration & Wiring
4–20 mA (2-žilni): Best for long cables and noisy environments; 12–36 VDC loop power with proper loop impedance.
0–10 V / 0–5 V: Simple panel-meter/DAQ hookup; use high-impedance input (>10 kΩ) and clean supply.
Ratiometric / I²C: For embedded devices; short leads, stable 5 V, pull-ups on I²C, and cable shielding recommended.
Example: 0–10 V to PLC
+24V ── Sensor V+ PLC AI (0–10V) ── Sensor Vout
GND ── Sensor GND PLC GND ───────── Sensor GND
H Port ← High side L Port ← Low side (reference)Pinouts vary by connector (JST/Molex/M12/DIN). Refer to the product datasheet for orientation and wiring.
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)
- Ports (barbed size, M5, 1/8-NPT, manifold)
- Connector (JST/Molex, cable pigtail, M12 via harness)
- Environment (temperature, condensation, vibration)
- Calibration (zero/span points, filter constants)
Pogoji programa
- Samples for DFM and validation
- Stopenjsko določanje cen za razporede količin
- Private labeling & custom packaging
- 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 perform on-site zeroing?
Power up and allow 1–5 minutes warm-up. Vent both ports to ambient (tubes off or both open), then press the ZERO key or use the software command. For analog units, trim to 0 V or 4 mA with both ports vented.
How should I route the tubing for best accuracy?
Keep H/L tubes equal length, avoid kinks, and mount ports level. Use short runs for faster dynamics and add hydrophobic filters or drip loops to keep moisture out.
Will long tubing slow the response?
Yes—added volume and friction create damping. Shorten lines or increase ID for quicker response, and apply 0.5–3 s averaging to stabilize HVAC readings.
What is the static pressure rating vs. the ΔP range?
ΔP range is the measurable difference; static pressure is the absolute pressure present on both ports. Verify the sensor’s maximum static rating exceeds your duct or process static pressure.
How does temperature affect accuracy?
Sensors are temperature-compensated, but residual error remains. Install away from heat sources, allow warm-up, and request multi-point calibration over your operating band if needed.
What calibration interval do you recommend?
Commonly 12 months for HVAC/cleanrooms; 6 months for critical processes. We can provide certificates and help align intervals with your QA procedures.
Več znanja o senzorjih hladilnega sredstva
Pressure Units: The Complete Guide (with Conversion Tables & Sensor Tips)
Naučite se najpogostejših enot za tlak (Pa, kPa, MPa, bar, mbar, psi, atm, Torr/mmHg, inHg, inH₂O), kdaj uporabiti vsako od njih in kako natančno pretvoriti z uporabo formul, primerov in tabel za hitro pretvorbo – ter nasvetov za določanje senzorjev tlaka.
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