Honeywell 621‑4350 (6214350) Pressure Sensor — Comprehensive Product Overview

1. Product Name and Introduction

Product Name: Honeywell 621‑4350 / 6214350

The Honeywell 621‑4350 is a high-performance industrial gauge pressure sensor designed for applications requiring precise, reliable, and long-term pressure measurement in demanding environments. Part of the 621 Series Industrial Pressure Sensors, this model provides a wide pressure range and rugged construction, making it suitable for heavy-duty industrial, hydraulic, and mobile applications.

The 621‑4350 is engineered for stability under continuous operation in environments with shock, vibration, temperature extremes, and exposure to moisture. Its robust stainless steel housing, sealed electrical connections, and selectable analog outputs ensure reliability and compatibility with a wide range of control systems.

This sensor is widely applied in industrial automation, heavy machinery, energy production, chemical processing, and mobile equipment where accurate pressure monitoring is critical for system performance, safety, and efficiency.

2. Brand and Product Series

Brand: Honeywell

Series: 621 Series Industrial Pressure Sensors

The 621 Series is known for:

• Rugged mechanical design suitable for harsh industrial environments

• Wide range of pressure measurement options for both low and high pressures

• Selectable output signals compatible with standard industrial systems

• Reliable long-term accuracy and minimal drift over time

• Standardized connection interfaces for easy installation and replacement

The 621‑4350 is a high-end model in the series, providing high-range pressure measurement while maintaining environmental durability and precision.

3. Product Specifications

4. Product Applications

The Honeywell 621‑4350 is suitable for a broad range of high-pressure and harsh environment applications:

Industrial Automation

Used in automated production systems to monitor hydraulic and pneumatic pressures. Helps regulate valves, actuators, and other control devices while ensuring system safety.

Heavy Machinery & Mobile Equipment

Ideal for excavators, loaders, cranes, and mining equipment to monitor hydraulic circuits under vibration and shock. Its rugged design ensures reliable operation in mobile and industrial equipment.

Energy Production Systems

Used in turbines, hydraulic circuits, and high-pressure steam lines. Provides critical feedback for safety interlocks and operational efficiency.

Water and Wastewater Management

Monitors pumping stations, filtration lines, and pressure control systems, supporting preventive maintenance and protecting infrastructure.

Chemical and Petrochemical Processes

Provides accurate pressure feedback in reactors, pipelines, and chemical process loops, supporting safety, quality, and compliance.

Hydraulic Presses and Manufacturing Equipment

Monitors high-pressure hydraulic circuits in presses, injection molding machines, and fluid power systems.

5. Product Advantages

• High Accuracy: ±0.5% FS ensures precise, repeatable measurements.

• Wide Pressure Range: 0–4350 PSI suits demanding applications.

• Rugged Construction: Stainless steel housing and reinforced seals resist harsh conditions.

• Selectable Outputs: Compatible with 4–20 mA or 0–10 V systems.

• Shock & Vibration Resistant: Withstands 60 g shock and 15 g vibration.

• IP67 Protection: Dustproof and water-resistant for industrial and outdoor use.

• Wide Temperature Range: –40°C to +125°C ensures versatility in extreme conditions.

• Standardized Connections: Easy installation with 1/4″ NPT mechanical and 3‑pin sealed electrical connectors.

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