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- 621-2201 621-2201R
- Output Module
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- 105 × 58 × 48 mm
- 0.44kg
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Honeywell 621‑2201 / 621‑2201R Pressure Sensor — Full Product Overview, Specifications, Applications, Advantages, Related Models, Popular Brand Models, and FAQ
1. Product Name and Introduction
Product Name: Honeywell 621‑2201 / 621‑2201R
The Honeywell 621‑2201 and its reinforced variant 621‑2201R are high-precision industrial pressure sensors from the renowned 621 Series. These sensors are designed for demanding environments where accurate gauge pressure measurement, long-term stability, and environmental resistance are critical.
The R version features a reinforced, corrosion-resistant housing, making it suitable for harsh industrial or mobile applications where exposure to moisture, dust, and chemical contaminants is common. Both models provide selectable analog outputs, making them easily integrable with PLCs, industrial controllers, and data acquisition systems.
The 621‑2201 series is engineered for reliability, compactness, and adaptability, providing precise pressure readings in industrial automation, fluid power systems, heavy machinery, and process control.
2. Brand and Series
Brand: Honeywell
Series: 621 Series Industrial Pressure Sensors
The 621 Series is a family of rugged, reliable industrial pressure sensors with wide operating temperature ranges, high vibration and shock resistance, and standardized connections. The series is widely used across industrial automation, HVAC/R, hydraulic and pneumatic systems, water and wastewater management, and mobile equipment applications.
3. Product Specifications
| Parameter | Specification |
|---|---|
| Model | 621‑2201 / 621‑2201R |
| Pressure Type | Gauge pressure |
| Pressure Range | 0–2200 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) | 105 × 58 × 48 mm |
| Weight | 0.44 kg |
| Housing Material | Stainless steel (R version reinforced for corrosion resistance) |
| Seal Material | Viton or Buna-N elastomer |
| Environmental Protection | IP67 / IP68 (R version) |
| Vibration Resistance | 10 g |
| Shock Resistance | 50 g |
4. Product Applications
Industrial Automation:
Used for pressure feedback in automated machinery, hydraulic and pneumatic actuators, valves, and safety interlocks, ensuring consistent operation and process efficiency.
Hydraulic & Pneumatic Systems:
Monitors pressure in pumps, circuits, and actuators to prevent overpressure and maintain system stability.
Mobile & Heavy Equipment:
Applied in construction, agricultural, and mining vehicles to measure pressures under vibration, load variation, and harsh outdoor conditions.
HVAC & Refrigeration:
Measures refrigerant, duct, and compressor pressures to optimize system performance and prevent damage.
Water & Wastewater Management:
Pressure monitoring in pipelines, pumps, and filtration systems enhances flow control and protects equipment.
Energy & Power Systems:
Monitors pressure in turbines, generators, and auxiliary circuits for safety, diagnostics, and efficiency.
5. Product Advantages
High Accuracy & Stability:
±0.5% FS accuracy ensures consistent and repeatable measurements.
Reinforced Corrosion Resistance:
The R variant offers enhanced housing and sealing materials to withstand harsh, corrosive, or wet environments.
Selectable Output Signals:
4–20 mA or 0–10 VDC outputs enable easy integration with industrial controllers and data acquisition systems.
Wide Operating Temperature:
Operates reliably from –40°C to +125°C.
Environmental Protection:
IP67 (standard) and IP68 (R version) protection ensures resistance to dust, water, and immersion.
Compact Design:
Fits tight spaces while maintaining ruggedness and precision.
High Shock & Vibration Tolerance:
Designed for heavy machinery and mobile applications with vibration up to 10 g and shock up to 50 g.
6. Related Models — Same Series or Similar Types
| Model | Pressure Range | Output | Accuracy | Dimensions (mm) | Weight (kg) |
|---|---|---|---|---|---|
| 621‑2150RC | 0–1500 PSI | 4–20 mA / 0–10 V | ±0.5% FS | 100 × 55 × 45 | 0.38 |
| 621‑2175RC | 0–1750 PSI | 4–20 mA / 0–10 V | ±0.5% FS | 102 × 56 × 45 | 0.40 |
| 621‑2200RC | 0–2200 PSI | 4–20 mA / 0–10 V | ±0.5% FS | 105 × 58 × 48 | 0.43 |
| 621‑2500RC | 0–2000 PSI | 4–20 mA | ±0.5% FS | 105 × 58 × 48 | 0.41 |
| 621‑3000RC | 0–3000 PSI | 4–20 mA | ±0.5% FS | 110 × 60 × 50 | 0.47 |
7. Popular Models — Other Strong Choices from the Same Brand
| Model | Sensor Type | Key Feature | Output | Dimensions (mm) | Weight (kg) |
|---|---|---|---|---|---|
| PX90 | Pressure Transducer | High industrial accuracy | 4–20 mA / 0–10 V | 92 × 50 × 45 | 0.33 |
| SCX Series | Differential Pressure Sensor | Accurate ΔP measurements | 4–20 mA | 80 × 40 × 30 | 0.21 |
| ABP Series | Board-Mount Pressure Sensor | Compact OEM integration | Analog / Digital | 30 × 20 × 12 | 0.05 |
| TCR700 | Temperature Sensor | Wide temperature range | 4–20 mA | 65 × 22 × 15 | 0.14 |
| RH700 | Humidity & Temperature Sensor | Dual parameter sensing | Digital | 48 × 48 × 16 | 0.11 |
8. Frequently Asked Questions (FAQ)
Q1: What type of pressure does the 621‑2201 measure?
A1: It measures gauge pressure, relative to atmospheric pressure.
Q2: What is the pressure range?
A2: 0–2200 PSI, suitable for high-pressure industrial applications.
Q3: What is the difference between 621‑2201 and 621‑2201R?
A3: The R version is reinforced for corrosion resistance, offering enhanced protection against moisture, chemicals, and harsh environments.
Q4: What output signals are available?
A4: Selectable 4–20 mA or 0–10 VDC analog outputs.
Q5: What is the accuracy?
A5: ±0.5% of full scale.
Q6: Can it operate outdoors in extreme temperatures?
A6: Yes, the operating range is –40°C to +125°C.
Q7: Which media are compatible?
A7: Air, inert gases, and non-corrosive hydraulic fluids.
Q8: What type of mechanical connection does it use?
A8: Standard 1/4″ NPT male threaded connection.
Q9: Is periodic calibration required?
A9: Factory-calibrated; periodic verification is recommended for critical systems.
Q10: Which industries commonly use this sensor?
A10: Industrial automation, hydraulics, mobile machinery, HVAC/R systems, water/wastewater treatment, and energy systems.