HEPA filter clogging gauges in Vietnam currently range from approximately VND 2 million to more than VND 11 million, depending on whether the device is mechanical, electronic, alarm-equipped or supplied with a 4–20 mA output and calibration documents.
- How much does a HEPA filter clogging gauge cost?
- Current reference prices
- Current Dwyer 2000-500PA and 2000-750PA prices
- What is a HEPA filter clogging gauge?
- Mechanical gauge price
- Dirty-filter alarm package price
- Electronic and 4–20 mA device price
- Selecting the measuring range
- Are installation accessories included?
- Is calibration included?
- Main factors affecting price
- Which type should be selected?
- What should a quotation include?
- Frequently asked questions
- Conclusion
How much does a HEPA filter clogging gauge cost?
Based on public Vietnamese listings reviewed on July 4, 2026, a mechanical HEPA filter differential pressure gauge generally costs approximately VND 2–4.6 million per unit.
Electronic differential pressure gauges and sensors with 4–20 mA output typically have a reference price of approximately VND 3.2–6 million for standard HVAC configurations. Premium imported transmitters with improved protection, accuracy or integration capability may cost more than VND 10–11 million per measuring point.
These prices should not be applied to every HEPA system without reviewing the required measuring range, output, alarm function, accessories and calibration scope.
Current reference prices
| Device type | Reference price |
|---|---|
| Standard mechanical differential pressure gauge | VND 1.95–2.8 million |
| Dwyer Series 2000 mechanical gauge | Approximately VND 2.33–4.6 million |
| Standard 4–20 mA differential pressure sensor | VND 3.2–4.5 million |
| Digital gauge with display and 4–20 mA | VND 4.5–6 million |
| Premium imported HVAC transmitter | Approximately VND 10–12 million or more |
| PLC/HMI monitoring system | Quoted according to configuration |
A Vietnamese public price guide lists the mechanical Dwyer Series 2000 at VND 1.95–2.8 million, the Dwyer DigiMag Series 605 at VND 4.5–6 million and the AirDiffer PT50 transmitter at VND 3.2–4.5 million.
Actual project prices can differ according to stock, order quantity, import cost, accessories, calibration and warranty conditions.
Current Dwyer 2000-500PA and 2000-750PA prices
The 0–500 Pa and 0–750 Pa ranges are commonly considered for filter-pressure-drop monitoring.
One Vietnamese measuring-equipment retailer currently lists the Dwyer 2000-500PA at VND 2,330,245 excluding VAT, or VND 2,516,665 including VAT.
The Dwyer 2000-750PA is listed at the same price, with published stock availability.
Another market guide places the 2000-500PA at VND 3.3–4 million, the 2000-1000PA at VND 3.5–4.2 million and the 2000-2500PA at VND 3.8–4.6 million before VAT.
The difference may reflect distribution policy, availability, project quantity, documentation, accessories, calibration and warranty scope.
What is a HEPA filter clogging gauge?
A HEPA filter clogging gauge measures differential pressure between the upstream and downstream sides of a HEPA filter.
The High port is connected upstream and the Low port downstream. As particle loading increases filter resistance, differential pressure normally rises when airflow remains comparable.
Dwyer identifies its Series 2000 Magnehelic as a no-power, low-differential-pressure gauge suitable for filter monitoring, air-handling systems and cleanroom applications.
The device may also be called a HEPA differential pressure gauge, filter pressure-drop gauge, dirty-filter indicator or filter loading gauge.
Mechanical gauge price
Mechanical gauges are widely installed on HEPA boxes, AHUs, dynamic pass boxes, air showers, FFUs and independent filtration equipment.
They normally require no power, provide clear local indication and have a relatively simple construction.
A practical budget for a commonly imported mechanical gauge is approximately VND 2.3–4 million per unit. Special ranges, higher-capacity models or packages including documentation may reach approximately VND 4.6 million.
Project pricing may be lower for larger quantities, while urgent delivery, calibration or special documentation can increase the final cost.
Dirty-filter alarm package price
A basic mechanical gauge only displays the measured value. To generate an automatic alarm, the installation requires a differential pressure switch, relay or electronic alarm device.
Vietnamese suppliers offer dirty-filter packages combining DPG gauges and PS pressure switches in ranges including 0–200 Pa, 0–300 Pa, 0–500 Pa, 0–600 Pa and 0–1,500 Pa. Many of these products are quoted according to configuration rather than sold at a fixed public price.
This arrangement is suitable when the operator needs a local pointer display together with an electrical contact for a lamp, buzzer or control panel.
The quotation should clearly state whether the gauge, pressure switch, tubing, pressure taps and installation are all included.
Electronic and 4–20 mA device price
Electronic gauges and differential pressure sensors with 4–20 mA output are used when the value must be transmitted to a PLC, HMI, BMS or central monitoring system.
One Vietnamese public guide lists the AirDiffer PT50 transmitter at approximately VND 3.2–4.5 million and the Dwyer DigiMag Series 605 indicating transmitter at approximately VND 4.5–6 million.
At the higher end, the Dwyer 668C-1 HVAC differential pressure transmitter is listed at VND 11,340,173 excluding VAT, or VND 12,247,387 including VAT. The published specification includes a 4–20 mA current output and ±1% full-scale accuracy.
The instrument price does not include every integration cost. A complete system may also require a 24 VDC power supply, signal cable, PLC input module, HMI programming, alarm configuration and loop testing.
Selecting the measuring range
There is no universal pressure range for every HEPA filter.
The range should be selected from the clean-filter pressure drop at design airflow, recommended final resistance, fan capability and required operating margin.
Ranges such as 0–250 Pa, 0–500 Pa, 0–750 Pa and 0–1,000 Pa are commonly associated with filter applications. A Vietnamese market guide identifies Dwyer 2000-250PA, 2000-500PA and 2000-1000PA as models used for HEPA, AHU and FCU filter monitoring.
A range that is too narrow can be exceeded as the filter loads. A range that is too wide makes important changes difficult to observe.
Are installation accessories included?
A complete installation may require the gauge body, pressure tubing, upstream and downstream pressure taps, fittings, unused-port plugs and flush-mounting accessories.
Some quotations cover only the gauge body. Others include basic fittings but not extended tubing, enclosures or installation work.
For HEPA boxes, pass boxes and air showers, the buyer should confirm whether pressure tapping points have already been provided by the equipment manufacturer.
Is calibration included?
Public retail prices do not automatically include local calibration certificates.
Where traceable calibration is required, the quotation should define the range, number of test points, permissible error, calibration laboratory and certificate validity.
For a mechanical gauge, moving the pointer back to zero is not equivalent to calibration.
For a 4–20 mA transmitter, calibration should verify both pressure measurement and electrical output, including the value received by the PLC or HMI.
Main factors affecting price
The measuring range is one of the first factors. Standard stock ranges are usually less expensive than special or bidirectional ranges.
Brand and country of origin also influence pricing. Dwyer, Vaisala, Produal, Sensys and other international brands offer different levels of accuracy, enclosure protection and signal capability.
Additional cost may come from displays, relays, 4–20 mA, 0–10 V, Modbus, ingress protection, overpressure capability, calibration and project documentation.
Quantity, delivery time, VAT and exchange rates can also affect the final quotation.
Which type should be selected?
For a HEPA box, pass box or air shower requiring only local inspection, a mechanical gauge is generally the most economical choice.
For an AHU requiring a dirty-filter lamp or buzzer, a gauge combined with a differential pressure switch may be appropriate.
For central monitoring, historical data or HMI display, an electronic gauge or differential pressure transmitter with 4–20 mA, 0–10 V or Modbus output is more suitable.
Critical GMP applications may use both a local mechanical gauge and an electronic transmitter to provide independent indication and central alarm capability.
What should a quotation include?
A technically complete quotation should identify the manufacturer, model, range, unit, accuracy, country of origin, output signal, power supply, accessories, CO, CQ, calibration, VAT, delivery time and warranty.
Two quotations should not be compared directly when one includes calibration and installation accessories while the other includes only the instrument body.
For automated systems, equipment, installation materials, programming, loop checks and commissioning should be priced separately.
Frequently asked questions
What is the lowest current price?
A current public listing shows VND 2,330,245 excluding VAT for the Dwyer 2000-500PA and 2000-750PA. Other market guides start from approximately VND 1.95 million, subject to model and supply scope.
How much is the Dwyer 2000-500PA?
One current listing is VND 2,330,245 excluding VAT, while another market guide places it at approximately VND 3.3–4 million before VAT.
How much is a 4–20 mA model?
Standard devices are referenced at approximately VND 3.2–6 million. Premium imported transmitters may exceed VND 11 million before VAT.
Can a 0–60 Pa gauge be used for a HEPA filter?
Only when the actual clean and final filter resistance remain within that range. For many HEPA applications, 0–60 Pa is too low.
Is calibration included in the purchase price?
Not automatically. It must be explicitly stated in the quotation and delivery documentation.
Can one gauge monitor several filter stages?
It can measure the combined pressure drop, but it will not identify which individual filter stage is loaded.
Conclusion
Mechanical HEPA filter clogging gauges in Vietnam currently cost approximately VND 2.3–4.6 million for common imported models.
Electronic gauges and standard 4–20 mA transmitters are generally budgeted at approximately VND 3.2–6 million, while premium imported transmitters may exceed VND 11 million before VAT.
The lowest price is not necessarily the best selection. The instrument must have the correct range, output, accessories and calibration capability for the application.
VCR Cleanroom Equipment supplies mechanical HEPA differential pressure gauges, dirty-filter alarm packages and electronic transmitters for HEPA boxes, AHUs, FFUs, pass boxes, air showers, laminar airflow units and dispensing booths. VCR also supports range selection, alarm configuration, calibration, CO/CQ documentation and project commissioning.
