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- 155 × 85 × 68 mm
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Honeywell 621‑6575RC (6216575RC) Pressure Sensor — Full Technical Overview, Specifications, Applications, Advantages, Related Models, Popular Brand Models, and FAQ
1. Product Name and Overview
Product Name: Honeywell 621‑6575RC / 6216575RC
The Honeywell 621‑6575RC is an industrial‑grade, high‑pressure gauge pressure sensor from the reinforced 621 Series. The “RC” designation indicates reinforced construction and enhanced corrosion resistance, making it suitable for the harshest industrial and hydraulic environments.
This model is designed for reliable high-pressure measurement, delivering precise, repeatable outputs over years of continuous operation. It integrates robust mechanical housing with advanced sensing electronics to withstand vibration, shock, moisture, and dust. The 621‑6575RC is ideal for systems requiring dependable feedback for process control, safety monitoring, and equipment protection.
2. Brand and Product Series
Brand: Honeywell
Series: 621 Series Industrial Pressure Sensors
The 621 Series is renowned for:
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High accuracy and stability — minimal drift over time.
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Broad environmental resistance — IP67 rating, vibration and shock resistance.
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Wide pressure range options — suitable for low to extremely high pressures.
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Standardized mechanical and electrical interfaces — easy integration.
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Long service life — designed for continuous industrial operations.
The 621‑6575RC is the reinforced, corrosion-resistant variant of this series, offering maximum durability under extreme conditions.
3. Product Specifications
| Parameter | Specification |
|---|---|
| Model | 621‑6575RC |
| Pressure Type | Gauge pressure |
| Pressure Range | 0–6575 PSI |
| Accuracy | ±0.5 % of Full Scale (FS) |
| Output Signal | 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) | 155 × 85 × 68 mm |
| Weight | 1.12 kg |
| Housing Material | Reinforced stainless steel with corrosion‑resistant finish |
| Seal Material | Viton or Buna‑N elastomer |
| Environmental Protection | IP67 |
| Vibration Resistance | 15 g |
| Shock Resistance | 60 g |
4. Product Applications
Industrial Automation & Control: Provides real-time pressure feedback for PLCs, supporting automated hydraulic and pneumatic control loops, safety interlocks, and process optimization.
Heavy Machinery & Mobile Equipment: Installed on construction, mining, agricultural, and material handling equipment to monitor high-pressure hydraulic circuits under vibration and mechanical stress.
Hydraulic Systems & Fluid Power: Ensures protection of high-pressure pumps, presses, and fluid power units, preventing overpressure and ensuring safe operation.
Energy & Power Generation: Suitable for high-pressure steam lines, turbine auxiliaries, and hydraulic systems in generators for precise monitoring and control.
Water & Wastewater Infrastructure: Used in high-pressure pumping stations and pipelines for pressure regulation and preventive maintenance.
Chemical & Petrochemical Processes: Provides reliable measurement in high-pressure reactors, pipelines, and process loops, maintaining product quality and safety compliance.
5. Product Advantages
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High accuracy and repeatability — ±0.5 % FS accuracy.
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Extensive pressure range — 0–6575 PSI suitable for extreme conditions.
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Selectable output signals — 4–20 mA or 0–10 VDC for system flexibility.
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Reinforced construction — corrosion-resistant housing and durable seals.
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Wide operating temperature — –40 °C to +125 °C.
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Industrial-grade environmental protection — IP67 dust and water resistance.
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Shock and vibration tolerance — 60 g shock, 15 g vibration.
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Standardized interfaces — 1/4″ NPT male connection and sealed electrical connector for easy installation.
6. Related Models — Same Series or Comparable Types
| Model | Pressure Range | Output | Accuracy | Dimensions (mm) | Weight (kg) |
|---|---|---|---|---|---|
| 621‑6500RC | 0–6500 PSI | 4–20 mA / 0–10 V | ±0.5 % FS | 150 × 80 × 65 | 1.00 |
| 621‑6350RC | 0–6350 PSI | 4–20 mA / 0–10 V | ±0.5 % FS | 150 × 80 × 65 | 0.95 |
| 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 |
| 621‑6000 | 0–6000 PSI | 4–20 mA / 0–10 V | ±0.5 % FS | 148 × 78 × 63 | 0.92 |
7. Popular Models — Recommended from the Same Brand
| 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 | Small differential pressure | 4–20 mA | 80 × 40 × 30 | 0.21 |
| ABP Series | Compact Board‑Mount Pressure Sensor | OEM board‑mount design | 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 and temp monitoring | Digital | 48 × 48 × 16 | 0.11 |
8. Frequently Asked Questions (FAQ)
Q1: What type of pressure does the 621‑6575RC measure?
A1: It measures gauge pressure, the pressure relative to atmospheric pressure.
Q2: What is the pressure range of this model?
A2: It measures pressures from 0 to 6575 PSI, suitable for extremely high-pressure industrial systems.
Q3: What output signal options are available?
A3: The sensor offers selectable 4–20 mA current output or 0–10 VDC voltage output.
Q4: What is its accuracy?
A4: The typical accuracy is ±0.5 % of full scale.
Q5: What operating temperatures can it withstand?
A5: It operates reliably in temperatures from –40 °C to +125 °C.
Q6: What media is it compatible with?
A6: Compatible with air, inert gases, and non‑corrosive hydraulic fluids.
Q7: What type of mechanical connection does it use?
A7: It uses a standard 1/4″ NPT male threaded connection.
Q8: What environmental protection does it have?
A8: It has an IP67 rating, protecting against dust and temporary water immersion.
Q9: Is the sensor factory calibrated?
A9: Yes, it is factory calibrated and ready for installation.
Q10: In which industries is this model commonly used?
A10: It is used in industrial automation, heavy machinery, hydraulic systems, energy production, water/wastewater management, and chemical processing.