8. Frequently Asked Questions (FAQ)

Q1: What type of pressure does the Honeywell 621‑3300 measure?

A1: It measures gauge pressure, which is the pressure relative to ambient atmospheric pressure.

Q2: What is the maximum pressure range for this model?

A2: The 621‑3300 is designed to measure pressures from 0 to 3300 PSI, making it suitable for high‑pressure industrial applications.

Q3: What output signals are available with this sensor?

A3: It offers selectable analog outputs: 4–20 mA current or 0–10 VDC voltage, depending on system requirements.

Q4: What accuracy can be expected?

A4: The sensor provides an accuracy of ±0.5% of full scale, ensuring reliable and repeatable pressure readings.

Q5: Can the 621‑3300 be used in outdoor environments?

A5: Yes. With an operating temperature range from –40°C to +125°C and IP67 protection, it is suitable for outdoor or harsh industrial installations.

Q6: What media can this sensor measure?

A6: It is compatible with air, inert gases, and non‑corrosive hydraulic fluids. Always confirm media compatibility before field installation for specific applications.

Q7: What mechanical connection does the sensor use?

A7: The sensor uses a standard 1/4″ NPT male threaded mechanical connection for installation in piping or manifolds.

Q8: Does the sensor require calibration before use?

A8: It is factory‑calibrated. Periodic verification or calibration may be recommended for critical systems or safety applications.

Q9: Can the sensor withstand vibration and shock?

A9: Yes. It is designed to tolerate vibration up to 10 g and shock up to 50 g, making it suitable for mobile machinery and industrial equipment.

Q10: In which industries is the 621‑3300 commonly used?

A10: Industries such as industrial automation, hydraulic systems, heavy machinery, HVAC/R systems, water and wastewater management, and energy production commonly use this sensor for reliable high‑pressure measurements.