8. Frequently Asked Questions (FAQ)

Q1: What type of pressure does the 621‑4550 measure?

A1: The 621‑4550 measures gauge pressure, meaning pressure relative to atmospheric pressure.

Q2: What is the pressure range for this model?

A2: It measures pressures from 0 to 4550 PSI, suitable for high‑pressure industrial and hydraulic applications.

Q3: What output signals are supported?

A3: Selectable analog outputs include 4–20 mA current or 0–10 VDC voltage to match control system requirements.

Q4: What is the accuracy of this sensor?

A4: The accuracy is approximately ±0.5% of full scale, providing consistent and precise pressure measurement.

Q5: What operating temperature range does it support?

A5: It operates reliably between –40°C and +125°C, covering extreme cold and hot environments.

Q6: What types of media can it measure?

A6: Compatible media include air, inert gases, and non‑corrosive hydraulic fluids. Media compatibility should be confirmed before installation.

Q7: What is the mechanical connection type?

A7: The sensor uses a standard 1/4″ NPT male threaded connection for installation into pressurized systems.

Q8: What environmental protection does it have?

A8: With an IP67 rating, it is resistant to dust and temporary immersion in water, suitable for outdoor and industrial environments.

Q9: Is this sensor factory calibrated?

A9: Yes, the 621‑4550 comes factory calibrated. Periodic verification or calibration may be recommended depending on the application.

Q10: Which industries commonly use this model?

A10: It is used in industrial automation, heavy machinery, hydraulic systems, energy and power systems, water/wastewater management, and chemical processing contexts.