8. Frequently Asked Questions (FAQ)

Q1: What does the Honeywell 621-2100 measure?

A1: The 621-2100 measures gauge pressure, giving a reading relative to atmospheric pressure. It is suitable for systems where monitoring pressure above ambient is needed.

Q2: What output options are available?

A2: The sensor supports selectable analog outputs: 4–20 mA current loop or 0–10 VDC voltage output, depending on system requirements.

Q3: What is the pressure range for this model?

A3: The standard configuration measures pressure from 0 up to 1000 PSI. Different calibration options may offer variations.

Q4: How accurate is the 621-2100?

A4: This model has an accuracy of ±0.5% of full scale, which means the measured value will be within this range of the actual pressure.

Q5: Can the sensor be used outdoors?

A5: Yes. With a wide operating temperature range and IP67 protection, it is suitable for outdoor use with appropriate mounting.

Q6: What media can be measured?

A6: The sensor is designed for air, inert gases, and many non-corrosive hydraulic fluids. Verify material compatibility for specific fluids.

Q7: What connection types does the sensor use?

A7: It utilizes a 1/4″ NPT male mechanical connection and an industry-standard 3-pin electrical connector.

Q8: Is periodic calibration needed?

A8: Factory calibration ensures accuracy at shipment. Periodic calibration may be recommended depending on application criticality.

Q9: How should it be installed for best results?

A9: Install on a stable surface, avoid excessive vibration, use appropriate sealant on threaded connections, and ensure electrical connections are protected from moisture.

Q10: What industries typically use this sensor?

A10: Industries such as manufacturing automation, HVAC systems, water treatment, mobile machinery, and general process control commonly use this sensor to monitor system pressures.