Honeywell 621‑4550 (6214550) Pressure Sensor — Full Product Overview, Specifications, Applications, Advantages, Related Models, Popular Brand Models, and FAQ

1. Product Name and Introduction

Product Name: Honeywell 621‑4550 / 6214550

The Honeywell 621‑4550 is a high‑pressure industrial gauge pressure sensor engineered to deliver precise, stable, and reliable measurements in demanding environments. It is part of the 621 Series Industrial Pressure Sensors, a family of rugged, field‑proven devices used where accuracy, durability, and long‑term performance are essential.

This model is designed for systems that operate under high hydraulic pressures and require real‑time pressure feedback for control, safety interlocks, diagnostics, or monitoring functions. The 621‑4550 features a robust mechanical construction, high environmental resistance, and selectable analog outputs that integrate easily with industrial controllers, PLCs (Programmable Logic Controllers), SCADA and data acquisition systems.

The sensor’s design emphasizes long‑term stability, mechanical ruggedness, environmental protection, and compatibility with a broad range of industrial media.

2. Brand and Product Series

Brand: Honeywell

Series: 621 Series Industrial Pressure Sensors

The 621 Series encompasses a broad range of industrial pressure transducers that combine precision sensing, rugged housings, and flexible electrical output options. These sensors are widely used in hydraulic systems, process automation, mobile machinery, energy systems, water/wastewater infrastructure, and other environments that demand reliable pressure measurement.

3. Product Specifications

4. Product Applications

The Honeywell 621‑4550 pressure sensor is designed for a wide range of heavy‑duty industrial applications where accurate, reliable gauge pressure monitoring is essential to system performance, safety, and efficiency:

Industrial Automation:
Used in automated manufacturing systems to monitor hydraulic and pneumatic pressures that drive actuators, valves, and safety interlocks. Pressure data from the 621‑4550 helps maintain process stability and machine performance.

Heavy Machinery & Mobile Equipment:
Installed on excavators, loaders, cranes, and mining machines where constant monitoring of hydraulic pressure is critical to operational safety and equipment longevity. The rugged mechanical design tolerates vibration, shock, and contamination.

Hydraulic & Fluid Power Systems:
Ideal for hydraulic presses, fluid control units, and high‑pressure power circuits. It provides real‑time pressure feedback that aids in regulating pump output and preventing overpressure conditions.

Energy Production & Power Systems:
Used in turbines, generators, and auxiliary hydraulic circuits to monitor fluid power pressures. Accurate pressure data supports safer operation and more efficient energy generation.

Water & Wastewater Management:
Monitors pressure in high‑pressure pumping stations, distribution lines, and filtration systems, helping protect infrastructure and optimize energy use.

Chemical & Petrochemical Processes:
Applied in high‑pressure process loops where precise pressure measurement helps ensure consistent product quality and compliance with safety regulations.

5. Product Advantages

High Accuracy:
With ±0.5% FS accuracy, the 621‑4550 delivers precise pressure readings critical for control, protection, and diagnostic systems.

Wide Pressure Range:
Supports measurement up to 4550 PSI, making it suitable for heavy‑duty industrial hydraulics and high‑pressure systems.

Flexible Output Signals:
Selectable analog outputs — 4–20 mA or 0–10 VDC — allow seamless integration with diverse industrial controllers and data acquisition systems.

Rugged Mechanical Design:
Reinforced stainless steel housing and durable elastomer seals enhance durability in harsh environments, reducing maintenance needs and extending service life.

Wide Temperature Range:
Operates reliably from –40°C to +125°C, accommodating both cold and hot industrial settings.

Industrial‑Grade Protection:
IP67 environmental protection rating ensures resistance to dust and temporary water immersion, making the sensor suitable for outdoor and washdown environments.

High Vibration and Shock Tolerance:
Built to withstand up to 15 g vibration and 60 g shock, ensuring reliable operation in mobile and industrial machines.

Standard Industrial Interfaces:
Standard 1/4″ NPT mechanical thread and sealed electrical connector simplify installation, retrofit, and replacement.

6. Recommended Models — Same Series or Related Types

Below are five related or comparable pressure sensor models. These are from the same 621 Series or designed for similar industrial applications with varying pressure ranges or configurations.

7. Popular Models — Other Strong Choices from the Same Brand

The following are five popular sensor models from the same brand that are widely used in different measurement contexts, including pressure, differential pressure, temperature, and environment monitoring.