When you need reliable climate control monitoring, our hvac pressure transmitter delivers enterprise-grade performance backed by over 20 years of manufacturing excellence. As China's No.1 OEM supplier with an annual production capacity exceeding two million sensors, Xi'an Qintai offers precision instruments featuring MEMS silicon piezoresistive technology with ±0.25% to ±1% Full Scale accuracy. Our transmitters operate flawlessly across -20°C to +85°C with ultra-low pressure sensing from 0-25 Pa up to 10,000 Pa, ensuring your critical HVAC systems maintain optimal performance in demanding environments.
Certified under ISO9001, IATF16949, CE, RoHS, and REACH standards, each unit undergoes rigorous factory testing. Our 86-strong R&D team continuously innovates to enhance long-term stability and minimize zero-point drift, making us the trusted core supplier to China Weichai Power, Yuchai Power, and Quanchai Power.

Our weight sensors utilize cutting-edge MEMS silicon piezoresistive innovation. This gives you with prevalent long-term steadiness compared to conventional mechanical plans. You get negligible zero-point float indeed after thousands of working hours.
The coordinates temperature recompense circuitry keeps up estimation precision over extraordinary conditions. Your office benefits from steady execution whether in solidifying winters or searing summers.
Every item highlights IP65/IP67-rated walled in areas built from flame-retardant ABS materials. This secures your speculation against mechanical vibration, clean, and stickiness introduction common in mechanical environments.
The fortified stomach withstands burst weights 3x to 5x higher than evaluated ranges. You won't confront unforeseen disappointments from weight spikes amid framework new businesses or shutdowns.
We offer three essential transmitter sorts to coordinate your application needs:
Differential Weight Transmittersmeasure the fluctuation between two weight focuses. These are culminate for channel checking and VAV box control where you require to track weight drops.
Gauge Weight Transmittersreference encompassing barometrical weight. You'll utilize these for standard conduit weight checking and chilled water framework applications.
Absolute Weight Transmittersmeasure against a idealize vacuum. These specialized units work best in refrigerant observing and barometric estimation applications.
| Parameter | Specification |
|---|---|
| Pressure Range | -1/0 bar, 0/1...600 bar |
| Medium Compatibility | All refrigerants |
| Overload Protection | 150% FS |
| Burst Pressure | 300% FS |
| Output Options | 4-20mA, 1-5V, 0.5~4.5V, 0-5V, 0-10V |
| Power Supply | 5VDC, 5~36VDC |
| Response Time | <5ms |
| Combined Error | 1% FSO; 0.5% FS |
| Repeatability | ≤ ±0.2% FSO |
| Long-term Stability | ≤ ±0.2% FS/year |
| Operating Temperature | -40°C ~ 135°C |
| Temperature Compensation | -30°C ~ 80°C |
| Pressure Connections | 3/8"-24UNF-2A, 7/16"-20UN G1/4, 1/8"NPT (customizable) |
| Electrical Connectors | Packard, Hirschmann, DIN4365, cable options |
| EMC Compliance | EN50081-1/-2, EN50082-2 |
Instep of supplanting channels on subjective plans, our transmitter tells you precisely when upkeep is required. As channels collect earth and wind current resistance increments, the sensor identifies this weight alter immediately.
This prescient approach spares you cash on untimely channel substitutions. It too avoids framework strain from clogged channels running as well long.
VAV frameworks depend on precise wind stream information to optimize vitality utilization. Our item works consistently with wind stream sensors to degree the correct volume entering each zone.
The controller employments this real-time information to alter dampers naturally. You accomplish culminate climate adjust whereas minimizing vitality squander all through your facility.
Critical situations require exact discuss course control. Positive weight keeps contaminants out of touchy fabricating regions. Negative weight contains unsafe materials in inquire about laboratories.
Our transmitters ceaselessly screen room weight compared to adjoining spaces. The control framework reacts immediately to keep up correct weight differentials, guaranteeing security compliance and prepare integrity.
By measuring weight over fan gatherings, you confirm operational status immediately. Progressed establishments coordinated our sensors with variable recurrence drives to keep up steady inactive weight in fundamental ducts.
The framework naturally alters fan speed based on genuine request. You kill the vitality squander of running fans at most extreme capacity when lower speeds suffice.
Monitor high-side and low-side weights in refrigeration circles for productive cooling execution. Our sensors moreover track weight in chilled water frameworks and hydronic warming loops.
Proper weight observing guarantees ideal water stream through pumps and channeling. You keep up framework productivity whereas avoiding harm from weight peculiarities.
Every hvac pressure transmitter leaving our facility undergoes comprehensive testing:
Zero-Point and Span Accuracy Testinguses Fluke-grade pressure calibrators. We verify each device operates within specified error margins before shipment.
Thermal Drift Testingsubjects units to environmental chamber cycles. This confirms internal compensation maintains signal integrity at temperature extremes you'll encounter in real installations.
Burst Pressure and Overpressure Testingensures sensor diaphragms handle extreme conditions. We test to 3x-5x rated ranges without permanent damage or leakage.
EMC/EMI Compliance Testingvalidates electromagnetic interference resilience. This is crucial when installing near high-power fan motors and VFDs that generate electrical noise.
Long-Term Stability Agingmonitors sensor output over 48-72 continuous operating hours. We detect early-stage component failures before products reach your facility.

Xi'an Qintai proudly serves as the core supplier to China's leading power system manufacturers. Our partnerships with Weichai Power, Yuchai Power, and Quanchai Power demonstrate the enterprise-grade reliability global leaders demand.
We hold China's No.1 market share position by consistently delivering sensors that meet the stringent requirements of automotive and industrial OEM applications. These partnerships validate our manufacturing excellence and technical innovation.

Our engineering team regularly participates in international HVAC exhibitions and industry conferences. We maintain active presence in Asian, European, and North American markets, sharing technical expertise with facility managers and system integrators worldwide.
With 58 invention patents applied and continuous R&D investment, we stay at the forefront of pressure sensing technology. Our global footprint ensures responsive technical support regardless of your location.

Our production facilities maintain substantial inventory to support rapid order fulfillment. With annual capacity exceeding two million sensors, we efficiently handle both small custom orders and large-scale deployments.
Strategic warehouse locations enable quick shipping to domestic and international destinations. We partner with reliable logistics providers to ensure your transmitters arrive safely and on schedule.

Each transmitter receives individual protective packaging designed to prevent damage during transit. Anti-static materials protect sensitive electronics, while shock-absorbing inserts guard against handling impacts.
We provide complete documentation including calibration certificates, installation guides, and technical specifications with every shipment. Custom packaging solutions are available for large-scale orders with special requirements.

We get it that standard setups do not fit each application. Our free R&D group works straightforwardly with you to create customized arrangements coordinating your particular weight ranges, yield signals, and mounting requirements.
Whether you require adjusted walled in areas for unforgiving situations or specialized calibration for special applications, we bolster adaptable item customization. Our comprehensive OEM and ODM administrations cover everything from starting plan meeting to mass production.
With 86 devoted R&D professionals and over 420 talented representatives, we have the specialized profundity to bring your vision to reality. We handle the total advancement cycle whereas you keep up center on your center business.
Q: What weight run ought to I select for channel observing applications?
A: For standard discuss channel observing, 0-500 Dad or 0-1000 Dad ranges work well for most HVAC frameworks. If you're observing HEPA channels in cleanrooms, consider 0-2500 Dad ranges due to higher beginning resistance.
Q: How do I know if I require a differential or gage weight transmitter?
A: Utilize differential weight transmitters when measuring weight distinction between two focuses, such as over channels or VAV boxes. Select gage weight transmitters for single-point estimations like conduit inactive weight or chilled water framework pressure.
Q: Can your transmitters withstand establishment close huge fan motors?
A: Yes, all units pass thorough EMC/EMI compliance testing particularly for establishments close high-power engines and VFDs. The IP65/IP67 walled in areas moreover ensure against vibration from turning equipment.
Q: What support do these transmitters require?
A: Our MEMS innovation requires negligible upkeep. We suggest yearly zero-point confirmation and recalibration each 2-3 a long time depending on your application. Clean weight ports occasionally if introduced in dusty environments.
Q: Do you give specialized bolster for integration with building computerization systems?
A: Completely. Our specialized group helps with integration into BACnet, Modbus, and other common building computerization conventions. We give point by point wiring charts and setup guidance.
Q: What guarantee do you offer?
A: We give standard 18-month guarantee scope from shipment date. Amplified guarantee alternatives are accessible for huge orders or mission-critical applications.
Q: Can you customize the weight extend and yield signal?
A: Yes, we offer comprehensive customization counting non-standard weight ranges, specialized yield signals, custom mounting arrangements, and altered walled in areas. Contact our building group to talk about your requirements.
Q: How rapidly can you fulfill orders?
A: Standard arrangements ordinarily transport inside 7-10 trade days. Custom orders require 3-4 weeks depending on detail complexity. We keep up stock of well known models for speedier conveyance.
Ready to upgrade your HVAC monitoring with hvac pressure transmitter? Email us at info@qt-sensor.com for immediate assistance with product selection, custom quotes, or technical questions.
Our customers’ satisfaction speaks for our quality — contact us to experience the same reliable service.