Honeywell 621‑3300 Pressure Sensor — Complete Product Description, Specifications, Applications, Advantages, Related Models, Popular Brand Models, and FAQ

1. Product Name and Overview

Product Name: Honeywell 621‑3300 / 6213300

The Honeywell 621‑3300 is a rugged industrial pressure sensor designed to deliver accurate and stable gauge pressure measurements in challenging environments. It belongs to the 621 Series of pressure sensors, which are engineered for durability, flexibility, and long‑term reliability across a wide range of industrial and commercial applications.

The 621‑3300 distinguishes itself by offering a higher pressure range than many standard 621 Series models, making it particularly suitable for heavy‑duty hydraulic systems, industrial process control, and applications requiring robust performance under elevated pressures. It provides selectable analog output signals that can be integrated easily with programmable logic controllers (PLCs), data acquisition systems, and control systems. The design prioritizes resistance to shock, vibration, moisture, and temperature extremes to maintain consistent performance over thousands of operational hours.

This product description covers the sensor’s specifications, practical applications, key advantages, recommended alternatives in the same series, popular models from the same brand, and answers to common questions in a clear QA format.

2. Brand and Series

Brand: Honeywell

Series: 621 Series Industrial Pressure Sensors

The 621 Series is a family of compact, rugged pressure sensors widely used in industrial control systems, automation, fluid power systems, energy equipment, and mobile machinery. Sensors in this series generally share common features such as selectable outputs, wide operating temperature ranges, standardized industrial connections, and reliable long‑life performance. The 621‑3300 stands out within this series for its extended pressure range and suitability for higher‑pressure hydraulic and process environments.

3. Product Specifications

4. Product Applications

The Honeywell 621‑3300 pressure sensor is engineered for accuracy and reliability in demanding environments where precise pressure measurement is essential for safety, performance, and control.

Industrial Automation and Control:
In manufacturing plants, this sensor provides feedback for pneumatic and hydraulic actuators, valves, and safety systems. Stable pressure readings improve process consistency and machine safety.

Heavy‑Duty Hydraulic Systems:
Well suited for high‑pressure hydraulics in presses, excavators, injection molding equipment, and other systems where pressures approach or exceed 3000 PSI.

Mobile and Construction Machinery:
Monitors system pressure in mobile hydraulic circuits on cranes, loaders, and drilling equipment. The rugged design withstands vibration and shock common in field use.

Water & Wastewater Pumping:
Used for monitoring and controlling pressures in high‑pressure pump discharge lines and filtration control systems.

Energy and Power Systems:
Deployed in auxiliary fluid systems of turbines, generators, and power distribution equipment where high‑pressure feedback is critical for safety and efficiency.

Process Control and Chemical Equipment:
Applied in pressurized process vessels in chemical, petrochemical, and related industries where stable pressure measurement is essential for regulatory compliance and quality assurance.

5. Product Advantages

The 621‑3300 pressure sensor offers several distinct advantages that make it suitable for challenging industrial environments.

High Accuracy and Stability:
With a full‑scale accuracy of ±0.5%, the 621‑3300 delivers precise pressure readings that support process control, diagnostics, and safety systems.

Extended Pressure Range:
Designed to measure up to 3300 PSI, it covers applications beyond standard medium‑pressure sensors, especially where elevated pressures are present.

Flexible Output Signals:
Selectable 4–20 mA or 0–10 VDC outputs allow easy integration with a wide variety of controllers and data systems without the need for external signal converters.

Robust Mechanical Design:
The stainless steel housing, durable seals, and rugged internal construction make it resistant to vibration, shock, and mechanical abuse.

Wide Operating Temperature Range:
With the ability to operate from –40°C to +125°C, the 621‑3300 maintains performance across a broad span of climates and industrial conditions.

Industrial‑Grade Protection:
The IP67 rating provides solid protection against dust ingress and temporary water exposure, making it suitable for outdoor and washdown applications.

Standard Industrial Interfaces:
With a 1/4″ NPT mechanical connection and sealed 3‑pin electrical connector, installation is straightforward in most industrial piping and control panels.

6. Recommended Models — Same Series or Related Types

The following table presents five models from the 621 Series or related pressure sensors with comparable capabilities but different ranges or design focuses.

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

Below are five popular sensor models from the same brand (Honeywell) that are frequently used in industrial measurement applications beyond the 621 Series.