How to Properly Calibrate Dwyer Sensors

Calibrating Dwyer sensors is essential to ensure accurate and stable measurements in systems like HVAC, BMS, cleanrooms, and industrial plants. In this guide, DLK shares professional calibration techniques for popular Dwyer sensor models—helping you optimize system performance and extend sensor lifespan.

1. Why Regular Calibration of Dwyer Sensors is Important

Although Dwyer sensors are known for high accuracy, periodic calibration is necessary to:

• Maintain measurement precision and prevent long-term drift
• Ensure compatibility with control systems (accurate output signals)
• Detect faults early and avoid system failures
• Comply with industry standards in critical environments (cleanrooms, factories, healthcare, etc.)

2. Recommended Calibration Intervals by Sensor Type

Calibration frequency may vary depending on usage environment and technical requirements. In harsh conditions, shorter intervals are advised.

3. Basic Dwyer Sensor Calibration Guide

Required Tools:

• Calibrator device (matching 4–20mA, 0–10V, or pressure ranges)
• 24V DC power supply (for standalone sensors)
• Multimeter for output signal measurement
• Stable lab or testing environment

Example Procedure – Differential Pressure Sensor (e.g., Dwyer Series 616KD):

1. Disconnect the sensor from the system (if no in-place calibration mode)
2. Connect a 24VDC power supply
3. Link the sensor’s output to a multimeter or calibrator
4. Apply reference pressures at input (e.g., 0 Pa – 250 Pa – 500 Pa)
5. Compare output (mA or V) to expected values
6. Adjust zero/offset or span if deviation exceeds acceptable range
7. Record all calibration data for technical reporting

Note: Models like Series 616KD or 628 have built-in zero/span knobs for manual adjustment.

4. Key Reminders During Calibration

• Always use certified, traceable calibration equipment
• Avoid calibration in environments with vibration, high humidity, dust, or electromagnetic interference
• Check the original calibration sticker, device ID, and production date for cycle planning
• Record results in a standardized log for compliance and audits

5. DLK – Official Calibration Support and Technical Services

As the authorized distributor of Dwyer sensors in Vietnam, DLK offers not only genuine equipment but also comprehensive technical support:

• Step-by-step calibration guides for each sensor model
• Original Dwyer documentation (Datasheets, Manuals, Calibration Guides)
• System integration consultation & troubleshooting for measurement errors
• On-site calibration support when needed

Need help? Contact DLK for expert guidance, training videos, or to book an on-site consultation. We support engineers and contractors from selection to long-term maintenance.

Final Thoughts

Proper calibration is a crucial step in ensuring that your HVAC, BMS, and industrial systems perform accurately, reliably, and safely. Let DLK be your trusted partner for selecting, installing, and maintaining robust and precise Dwyer sensor solutions.