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- 621-6350 6216350
- Digital Output Module
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Honeywell 621‑6350 (6216350) Pressure Sensor — Comprehensive Product Overview, Specifications, Applications, Advantages, Related Models, Popular Brand Models, and FAQ
1. Product Name and Introduction
Product Name: Honeywell 621‑6350 / 6216350
The Honeywell 621‑6350 is a high‑pressure industrial gauge pressure sensor designed to deliver precise and stable pressure measurement in extreme industrial environments. As a robust member of the 621 Series Industrial Pressure Sensors, this model offers an extended pressure range for applications requiring monitoring of very high pressures and dependable integration with industrial control systems.
Engineered for long‑lasting performance, the 621‑6350 combines rugged mechanical construction, reliable sensing elements, and selectable analog outputs compatible with PLCs, SCADA, industrial data acquisition systems, and safety interlocks. Its design enables sustained operation under vibration, shock, temperature extremes, and exposure to moisture without compromising measurement reliability.
This product is typically applied in hydraulic systems, energy and power equipment, heavy mechanics, process control, and fluid power applications where accurate pressure feedback is essential to performance, safety, and reliability.
2. Brand and Series
Brand: Honeywell
Series: 621 Series Industrial Pressure Sensors
The 621 Series is a family of industrial pressure sensors known for:
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Rugged mechanical design capable of withstanding harsh industrial environments
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Wide range of pressure spans from low to very high pressures
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Selectable output signals compatible with diverse control and monitoring systems
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Consistent long‑term performance with minimal drift
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Standardized mechanical and electrical interfaces for ease of installation
The 621‑6350 is positioned among the higher pressure members of this series, offering extended range and industrial durability.
3. Product Specifications
| Parameter | Specification |
|---|---|
| Model | 621‑6350 |
| Pressure Type | Gauge pressure |
| Pressure Range | 0–6350 PSI |
| Accuracy | ±0.5% of Full Scale (FS) |
| Output Signal | Selectable: 4–20 mA or 0–10 VDC |
| Supply Voltage | 10–30 VDC |
| Response Time | ≤ 5 ms |
| Operating Temperature Range | –40°C to +125°C |
| Media Compatibility | Air, inert gases, non‑corrosive hydraulic fluids |
| Mechanical Connection | 1/4″ NPT Male |
| Electrical Connector | Sealed industrial 3‑pin connector |
| Dimensions (L × W × H) | 150 × 80 × 65 mm |
| Weight | 0.98 kg |
| Housing Material | Reinforced stainless steel |
| Seal Material | Viton or Buna‑N elastomer |
| Environmental Protection | IP67 |
| Vibration Resistance | 15 g |
| Shock Resistance | 60 g |
4. Product Applications
The Honeywell 621‑6350 pressure sensor is suitable for high‑pressure environments across a variety of industries:
Industrial Automation and Control
In automated manufacturing systems, precise pressure feedback is critical for controlling actuators, valves, and safety interlocks. The 621‑6350 delivers stable output signals that ensure operational efficiency and system integrity over extended periods.
Heavy Machinery & Mobile Equipment
Applied to construction, mining, and agricultural machinery where hydraulic pressures can be extremely high. Its rugged construction and resistance to shock and vibration make it suitable for field use in challenging environments.
Hydraulic & Fluid Power Systems
Used in high‑pressure hydraulic circuits, pumps, and fluid control units for continuous pressure monitoring. Accurate readings help maintain system performance and prevent premature component wear.
Energy and Power Generation
Installed in turbines, auxiliary hydraulic systems, and generator fluid circuits where high pressures must be monitored to ensure safe and efficient operation.
Water & Wastewater Infrastructure
Applied to high‑pressure pumping stations and distribution networks to regulate pressure, protect pipelines, and support preventive maintenance strategies.
Chemical & Petrochemical Processes
In pressure‑controlled process loops, the sensor provides reliable feedback to maintain product consistency, ensure safety, and comply with regulatory requirements.
5. Product Advantages
The 621‑6350 offers several important advantages that make it well suited for demanding industrial environments:
High Accuracy Over Extended Range
The sensor’s ±0.5% FS accuracy across a wide range ensures precise pressure measurements critical for high‑pressure systems and control loops.
Selectable Output Flexibility
With 4–20 mA or 0–10 VDC output options, it integrates easily with a wide array of industrial systems without additional signal conversion.
Rugged Mechanical Construction
Reinforced stainless steel housing and elastomer seals provide excellent resistance to corrosion, abrasion, and mechanical impact.
Wide Operating Temperature Range
Capable of operating between –40°C and +125°C, it performs reliably in both cold and hot industrial settings.
High Environmental Ratings
The IP67 environmental protection rating ensures dust proofing and temporary water immersion protection, suitable for outdoor and industrial washdown applications.
Shock and Vibration Tolerance
Built to withstand 15 g vibration and 60 g shock, ensuring reliability in mobile, heavy machinery, and industrial installations.
Standardized Industrial Interfaces
Standard 1/4″ NPT mechanical thread and sealed electrical connector streamline installation and replacement, minimizing downtime.
6. Recommended Models — Same Series or Related Types
Below are five related models in the 621 Series offering similar industrial pressure measurement capabilities, varying in pressure range or construction:
| Model | Pressure Range | Output | Accuracy | Dimensions (mm) | Weight (kg) |
|---|---|---|---|---|---|
| 621‑6000 | 0–6000 PSI | 4–20 mA / 0–10 V | ±0.5% FS | 148 × 78 × 63 | 0.92 |
| 621‑6300R | 0–6300 PSI | 4–20 mA / 0–10 V | ±0.5% FS | 150 × 80 × 65 | 0.95 |
| 621‑6250RC | 0–6250 PSI | 4–20 mA | ±0.5% FS | 150 × 80 × 64 | 0.96 |
| 621‑4550 | 0–4550 PSI | 4–20 mA / 0–10 V | ±0.5% FS | 145 × 75 × 62 | 0.85 |
| 621‑4500R | 0–4500 PSI | 4–20 mA / 0–10 V | ±0.5% FS | 140 × 72 × 60 | 0.82 |
7. Popular Models — Other Strong Choices from the Same Brand
Below are five popular sensor models from the same brand that are widely used across industrial measurement applications:
| Model | Sensor Type | Key Feature | Output | Dimensions (mm) | Weight (kg) |
|---|---|---|---|---|---|
| PX90 | Pressure Transducer | High industrial pressure accuracy | 4–20 mA / 0–10 V | 92 × 50 × 45 | 0.33 |
| SCX Series | Differential Pressure Sensor | Differential ΔP measurement | 4–20 mA | 80 × 40 × 30 | 0.21 |
| ABP Series | Compact Board‑Mount Sensor | OEM integration | Analog / Digital | 30 × 20 × 12 | 0.05 |
| TCR700 | Temperature Sensor | Wide temperature range sensing | 4–20 mA | 65 × 22 × 15 | 0.14 |
| RH700 | Humidity & Temperature Sensor | Combined humidity & temperature | Digital | 48 × 48 × 16 | 0.11 |
8. Frequently Asked Questions (FAQ)
Q1: What type of pressure does the 621‑6350 measure?
A1: It measures gauge pressure, which is pressure relative to surrounding atmospheric pressure.
Q2: What is the pressure range of this model?
A2: The 621‑6350 measures pressures from 0 to 6350 PSI, suitable for very high‑pressure systems.
Q3: What output signal options are available?
A3: It offers selectable analog output: 4–20 mA current or 0–10 VDC voltage, depending on system requirements.
Q4: What is the accuracy of this sensor?
A4: Accuracy is ±0.5% of full scale, ensuring repeatable and stable pressure measurement.
Q5: What operating temperature range does it support?
A5: It operates reliably from –40°C to +125°C, suitable for extreme cold and heat.
Q6: What media can it measure?
A6: Compatible media include air, inert gases, and non‑corrosive hydraulic fluids.
Q7: What mechanical connection does it use?
A7: The sensor uses a 1/4″ NPT male threaded mechanical connection.
Q8: What environmental protection rating does it have?
A8: It has an IP67 rating, offering dust resistance and protection against temporary water immersion.
Q9: Is the sensor factory calibrated?
A9: Yes, the 621‑6350 is factory‑calibrated. Periodic verification may be recommended in critical applications.
Q10: In which industries is this sensor commonly used?
A10: It is widely used in industrial automation, hydraulic systems, mobile machinery, power generation, water/wastewater systems, and chemical/petrochemical processes.