8. Frequently Asked Questions (FAQ)

Q1: What type of pressure measurement does the Honeywell 621‑3502 provide?

A1: The 621‑3502 provides gauge pressure measurement, which means it measures pressure in relation to atmospheric pressure.

Q2: What pressure range does this model support?

A2: This sensor supports a pressure range from 0 to 3500 PSI, making it suitable for high‑pressure industrial applications.

Q3: What output signals are available on this sensor?

A3: The 621‑3502 offers selectable analog outputs: 4–20 mA current loop or 0–10 VDC voltage output.

Q4: How accurate is the 621‑3502?

A4: This sensor provides an accuracy of approximately ±0.5% of full scale, which ensures consistent and reliable pressure measurements.

Q5: What media can this sensor measure?

A5: It is compatible with air, inert gases, and non‑corrosive hydraulic fluids, but media compatibility should be confirmed before installation.

Q6: What environmental conditions can the sensor withstand?

A6: The 621‑3502 is rated IP67, which means it can resist dust ingress and temporary immersion in water. It is suitable for industrial environments and outdoor installations.

Q7: What mechanical connection is used for installation?

A7: The sensor uses a 1/4″ NPT male threaded connection, a standard industrial fitting for pressure equipment.

Q8: Does the sensor require periodic calibration?

A8: It comes factory‑calibrated. Depending on the application and regulatory requirements, periodic verification or calibration may be recommended.

Q9: What operating temperature range does this sensor support?

A9: It supports a broad operating range of –40°C to +125°C, suitable for both cold‑climate and high‑temperature industrial environments.

Q10: In what industries is the 621‑3502 commonly used?

A10: Typical industries include industrial automation, heavy machinery, hydraulics, water/wastewater systems, energy production, and process control environments where accurate high‑pressure measurement is required.