You are here:
Dwyer 668B/D Differential Pressure Transmitters
Dwyer 668B/D Differential Pressure Transmitters are compact, high-accuracy sensors designed for monitoring low differential pressure in HVAC and cleanroom applications. They provide stable output signals, fast response, and reliable performance, making them ideal for critical air flow and filter monitoring systems.
Looking for a Quote? Contact Us Now
Categories: Pressure Sensor
Description
The Dwyer 668B/D Differential Pressure Transmitters are engineered to measure low differential pressures of air and compatible gases with high precision. These transmitters use advanced capacitive sensing technology to deliver accurate and repeatable measurements across multiple pressure ranges. The 668B model offers analog outputs such as 4–20 mA or voltage signals, while the 668D model includes an integrated digital display for local pressure indication. Their compact, lightweight design allows easy installation in space-constrained environments, and the devices are commonly used for monitoring air filters, airflow, and static pressure in HVAC systems and cleanrooms.
In addition, the transmitters are designed for long-term stability and minimal drift, ensuring reliable performance over extended periods without frequent recalibration. They feature simple zero and span adjustment for field calibration, along with durable construction suitable for industrial and commercial environments. With multiple selectable pressure ranges and compatibility with building management systems (BMS), the 668B/D series provides a cost-effective and efficient solution for low-pressure monitoring applications.
QTech Safety is a leading supplier of Dwyer 668B/D Differential Pressure Transmitters in Ireland, offering competitive prices and fast worldwide shipping across United Kingdom (UK), Germany, France, Italy, Spain, United States USA, Canada, Mexico, and Western Australia (Perth). Buy Dwyer Instruments Pressure Sensor from one of Ireland’s most trusted industrial safety equipment suppliers.
Features of Dwyer 668B/D Differential Pressure Transmitters
- Measures low differential pressure of air and gases
- Available with analog output (668B) and digital display (668D)
- High accuracy and repeatability
- Compact and lightweight design
- Fast response time
- Easy zero and span adjustment
- Suitable for HVAC and cleanroom applications
- Compatible with BMS and control systems
- Multiple pressure range options
Technical Specifications of Dwyer 668B/D
- Type: Differential pressure transmitter (low pressure)
- Measurement range: Various ranges (e.g., ±0.25 in. w.c. to ±100 in. w.c.)
- Accuracy: ±1% full scale (typical)
- Output signal: 4–20 mA, 0–5 V, or 0–10 V
- Operating temperature: 0 to 50 °C (32 to 122 °F)
- Media compatibility: Clean air and non-combustible, compatible gases
- Power supply: 10–35 VDC (depending on output type)
- Display (668D): Integrated LCD for local indication
- Process connection: Barbed fittings for tubing
- Mounting: Wall or panel mount
- Calibration: Field adjustable zero and span
Pressure Sensor Part Number & Configuration Guide
Standard (Example) Part Number
668B-01-1
This is a reference configuration for the Dwyer Instruments Pressure Sensors. It represents one commonly supplied setup and helps customers understand how the part number is structured.
Configurable Part Number Format
668X-XX-X
Each X / XX in the part number indicates a selectable option that can be customized based on your application requirements such as Pressure Type, Connection Type, Pressure Range & Transmitter Output.
✅ Important: Final part number depends on the exact configuration needed for your machinery, environment, and monitoring system.
Applications
The Dwyer 668B/D Differential Pressure Transmitters is commonly used in industrial calibration and testing applications, including:
- HVAC duct and airflow monitoring
- Cleanroom pressure control
- Air filter condition monitoring
- Building automation systems (BMS)
- Laboratory and pharmaceutical environments
Why Choose QTech Safety?
At QTech Safety, we’re more than just a safety supplier we’re your trusted partner in workplace protection and compliance.
Here’s why companies across UK and Ireland (EU) choose us for safety products and training:
- Comprehensive Range of Safety Equipment:
From gas detection and PPE to industrial safety tools, we offer one of the widest selections of trusted brands all at competitive Irish market prices. - Test & Measurement Instruments You Can Trust:
We supply a wide range of test and measurement instruments from the most leading and trusted brands, including industrial sensors, multimeters, oscilloscopes, accelerometers, proximity sensors, and other advanced measurement tools to support accurate diagnostics, condition monitoring, calibration, and maintenance applications. - Expert Health & Safety Training:
We provide professional health and safety training programmes designed to help your workforce stay compliant and confident on the job. - Fast, Reliable Delivery Worldwide:
Whether you’re in Texas United States or Perth Western Australia, our fast delivery service ensures you get your safety equipment quickly and efficiently. - Trusted by European Businesses:
We’re proud to support industries across Europe (UK) with certified safety solutions, expert advice, and responsive customer service.
We Ship Worldwide
At QTech Safety, we supply industrial sensors and instrumentation across Ireland, offering fast and reliable worldwide delivery. Through strong global logistics partnerships, we ensure efficient shipping and professional support for customers in Europe, North America, and Australia.
🡆 Europe (United Kingdom, Ireland, Germany, France, Italy, Spain, and the rest of European Union)
🡆 Australia (Western Australia WA, Queensland QLD, and New South Wales NSW)
🡆 North America (United States, Canada, Mexico)
