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Honeywell 621‑3552RC (6213552RC) Pressure Sensor — Comprehensive Overview, Specifications, Applications, Advantages, Related Models, Popular Brand Models, and FAQ
1. Product Name and Introduction
Product Name: Honeywell 621‑3552RC / 6213552RC
The Honeywell 621‑3552RC is a high‑performance industrial pressure sensor designed for precise and reliable gauge pressure measurement in demanding applications. It belongs to the 621 Series, a family of robust sensors engineered to withstand harsh environments while providing accurate readings for industrial automation, hydraulic systems, mobile machinery, and process monitoring.
This model features a rugged stainless steel housing, reliable output signals, and compatibility with common industrial control systems, including PLCs, SCADA, and data acquisition systems. The 621‑3552RC is especially suited for applications where pressure measurement accuracy directly impacts safety, efficiency, and system performance.
2. Brand and Series
Brand: Honeywell
Series: 621 Series Industrial Pressure Sensors
The 621 Series is widely recognized in industrial sectors for its durability, wide pressure range, environmental protection, and flexibility in electrical outputs. These sensors are extensively used in industries such as hydraulics, energy production, water/wastewater management, mobile machinery, and automation control, offering both reliability and ease of integration.
3. Product Specifications
| Parameter | Specification |
|---|---|
| Model | 621‑3552RC |
| Pressure Type | Gauge pressure |
| Pressure Range | 0–3550 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 | Industrial sealed 3‑pin connector |
| Dimensions (L × W × H) | 122 × 65 × 55 mm |
| Weight | 0.60 kg |
| Housing Material | Stainless steel |
| Seal Material | Viton or Buna‑N elastomer |
| Environmental Protection | IP67 |
| Vibration Resistance | 10 g |
| Shock Resistance | 50 g |
4. Product Applications
The 621‑3552RC is suited for industrial, commercial, and mobile applications requiring accurate gauge pressure measurement.
Industrial Automation:
Provides reliable feedback for control loops, safety interlocks, and automated hydraulic or pneumatic systems.
Heavy-Duty Hydraulic Systems:
Used in machinery and stationary hydraulic circuits to monitor and optimize high-pressure operations.
Mobile Equipment & Construction Machinery:
Supports excavators, cranes, and loaders, helping maintain system safety and efficiency in dynamic conditions.
Water & Wastewater Systems:
Monitors pressure in pumps, pipelines, and filtration systems, ensuring operational safety and energy efficiency.
Energy Production & Power Systems:
Used in turbines, generators, and auxiliary hydraulic controls where accurate pressure monitoring improves system performance.
Chemical & Petrochemical Processes:
Ensures consistent pressure in high-pressure loops and vessels, supporting process safety and product quality.
5. Product Advantages
High Accuracy & Stability: ±0.5% FS ensures precise and reliable readings.
Wide Pressure Range: Measures up to 3550 PSI for high-pressure applications.
Flexible Output Options: Selectable 4–20 mA or 0–10 VDC outputs for easy integration.
Rugged & Reliable Design: Stainless steel housing and durable elastomer seals resist mechanical and environmental stresses.
Broad Operating Temperature: Performs between –40°C and +125°C for both extreme cold and heat.
Industrial Protection Rating: IP67 rating protects against dust and temporary water immersion.
Standardized Connections: 1/4″ NPT mechanical fitting and sealed 3‑pin connector simplify installation and maintenance.
6. Recommended Models — Same Series or Related Types
| Model | Pressure Range | Output | Accuracy | Dimensions (mm) | Weight (kg) |
|---|---|---|---|---|---|
| 621‑3500RC | 0–3500 PSI | 4–20 mA / 0–10 V | ±0.5% FS | 120 × 65 × 55 | 0.58 |
| 621‑3550RC | 0–3550 PSI | 4–20 mA / 0–10 V | ±0.5% FS | 122 × 65 × 55 | 0.59 |
| 621‑3600RC | 0–3600 PSI | 4–20 mA | ±0.5% FS | 125 × 65 × 55 | 0.61 |
| 621‑3700RC | 0–3700 PSI | 4–20 mA | ±0.5% FS | 128 × 68 × 55 | 0.63 |
| 621‑4000RC | 0–4000 PSI | 4–20 mA | ±0.5% FS | 130 × 70 × 60 | 0.65 |
7. Popular Models — Other Strong Choices from the Same Brand
| Model | Sensor Type | Key Feature | Output | Dimensions (mm) | Weight (kg) |
|---|---|---|---|---|---|
| PX90 | Pressure Transducer | Industrial high accuracy | 4–20 mA / 0–10 V | 92 × 50 × 45 | 0.33 |
| SCX Series | Differential Pressure Sensor | Differential pressure monitoring | 4–20 mA | 80 × 40 × 30 | 0.21 |
| ABP Series | Compact Board‑Mount Sensor | Space‑saving 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 | Dual humidity and temperature | Digital | 48 × 48 × 16 | 0.11 |
8. Frequently Asked Questions (FAQ)
Q1: What type of pressure does the 621‑3552RC measure?
A1: It measures gauge pressure, which is pressure relative to atmospheric pressure.
Q2: What is the maximum pressure range?
A2: The sensor supports up to 3550 PSI.
Q3: What output signals are available?
A3: It provides selectable 4–20 mA or 0–10 VDC analog outputs.
Q4: How accurate is this sensor?
A4: Accuracy is approximately ±0.5% of full scale.
Q5: What media is compatible?
A5: Compatible with air, inert gases, and non‑corrosive hydraulic fluids.
Q6: What environmental protection does it have?
A6: Rated IP67, it is dust-tight and resistant to temporary immersion in water.
Q7: What connection does it use?
A7: Uses a standard 1/4″ NPT male mechanical connection and a sealed 3‑pin electrical connector.
Q8: What temperature range can it operate in?
A8: Operates from –40°C to +125°C.
Q9: Is it suitable for mobile machinery?
A9: Yes, it is rugged enough for mobile equipment like cranes, loaders, and excavators.
Q10: Does it require recalibration?
A10: The sensor is factory‑calibrated, but periodic verification may be required depending on application requirements.