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Honeywell 621-2150 Pressure Sensor — Detailed Product Description, Specifications, Applications, Advantages, Related Models, Popular Brand Models, and FAQ
1. Product Name and Introduction
Product Name: Honeywell 621-2150
The Honeywell 621-2150 is a rugged industrial pressure sensor designed to provide high-precision pressure measurement in demanding environments. It is part of a well-established product line known for combining durability, accuracy, and versatility. The 621-2150 is engineered to deliver consistent analog output for control, monitoring, and automation systems across industrial, commercial, and mobile applications.
This sensor is constructed with industrial-grade materials and employs stable sensing technology to ensure reliable performance in systems that require accurate fluid or gas pressure feedback. Its robust design enables long service life even in environments exposed to vibration, temperature variations, moisture, and process contaminants.
2. Brand and Series
Brand: Honeywell
Series: 621 Series Industrial Pressure Sensors
The 621 Series is a line of compact, rugged pressure sensors widely used in industrial applications. This family emphasizes selectable output options, broad operating temperature ranges, standard industrial interfaces, and robust mechanical construction suitable for automated and control systems.
3. Detailed Specifications
| Parameter | Specification |
|---|---|
| Model | 621-2150 |
| Pressure Type | Gauge pressure |
| Pressure Range | 0–1500 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 |
| Temperature Range | –40°C to +125°C |
| Media Compatibility | Air, inert gases, hydraulic oil |
| Mechanical Connection | 1/4″ NPT Male |
| Electrical Connector | Industrial sealed 3-pin connector |
| Dimensions (L × W × H) | 100 × 55 × 45 mm |
| Weight | 0.35 kg |
| Enclosure Protection | IP67 |
| Vibration Resistance | 10 g |
| Shock Resistance | 50 g |
| Housing Material | Stainless steel |
| Seal Material | Viton or Buna-N |
4. Product Applications
The Honeywell 621-2150 pressure sensor is designed for pressure measurement and monitoring where durability, stability, and precision are required. The following four application areas illustrate typical use cases:
Industrial Automation and Control Systems
In automated production and process lines, the 621-2150 provides real-time pressure feedback for pneumatic and hydraulic components, enabling precise motion control, safety interlocks, and consistent process regulation.
Mobile Equipment and Heavy Machinery
Installed on construction, agricultural, and industrial vehicles, this sensor monitors hydraulic system pressures, ensuring safe operation of actuators, pistons, and pumps under load.
Fluid Power and Hydraulic Systems
Used to measure system and circuit pressure within hydraulic pumps, valves, and actuators. Reliable readings support system protection, energy efficiency, and diagnostic capabilities.
HVAC and Refrigeration
The sensor measures refrigerant pressures, duct pressure differentials, and line pressures. These readings help optimize system efficiency, protect compressors, and improve temperature control.
Water & Wastewater and Pump Control
Provides pressure information for distribution lines, pump stations, and filtration systems. Pressure feedback helps prevent equipment stress, maintain flow rates, and manage energy consumption.
Process Monitoring in Manufacturing
Applied in chemical, food, or pharmaceutical process lines where pressure condition feedback supports both quality control and safety systems.
5. Product Advantages
The 621-2150 pressure sensor offers a combination of dependable performance, rugged hardware, and practical design features that benefit system designers and field technicians alike.
High Precision and Consistent Performance
With ±0.5% full-scale accuracy, this sensor delivers reliable pressure readings that help maintain stable processes, reduce system variability, and improve overall quality control.
Selectable Output for Flexible Integration
Selectable analog output (4–20 mA or 0–10 VDC) allows easy interface with common PLCs, controllers, data acquisition systems, and other industrial instruments without additional converters.
Wide Operating Range and Temperature Tolerance
Designed to operate from –40°C to +125°C, the 621-2150 maintains performance across harsh temperature extremes, both indoors and outdoors.
Rugged Mechanical Construction
The sensor’s stainless steel housing and robust seals protect internal components from environmental stressors such as vibration, shock, and moisture, resulting in longer product life and reduced maintenance.
Standard Industrial Interfaces
1/4″ NPT mechanical connection and sealed industrial electrical connector provide ease of installation, reliable sealing, and compatibility with existing equipment.
Environmental Protection
High ingress protection (IP67) ensures resistance to dust and temporary water immersion, reducing the risk of field failure in wet and dusty industrial applications.
6. Related Models in the Same Series
The 621 Series includes multiple models tailored to different pressure range needs or installation preferences. Below are five related models with specifications:
| Model | Pressure Range | Output | Accuracy | Dimensions (mm) | Weight (kg) |
|---|---|---|---|---|---|
| 621-1100 | 0–50 PSI | 0–5 VDC | ±0.75% FS | 70 × 40 × 30 | 0.16 |
| 621-1201 | 0–200 PSI | 4–20 mA | ±0.5% FS | 80 × 45 × 35 | 0.20 |
| 621-1500 | 0–500 PSI | 4–20 mA | ±0.5% FS | 90 × 50 × 40 | 0.28 |
| 621-2100 | 0–1000 PSI | 4–20 mA / 0–10 V | ±0.5% FS | 95 × 50 × 40 | 0.31 |
| 621-2500 | 0–1500 PSI | 4–20 mA | ±0.5% FS | 100 × 55 × 45 | 0.34 |
7. Popular Models from the Same Brand
Below are five widely used industrial sensor models from the same brand, each representing different measurement needs while maintaining strong field performance:
| Model | Type | Key Feature | Output | Dimensions (mm) | Weight (kg) |
|---|---|---|---|---|---|
| PX90 Transducer | Industrial Pressure Sensor | High accuracy and rugged design | 4–20 mA / 0–10 V | 90 × 50 × 45 | 0.32 |
| SCX Differential Sensor | Differential Pressure Sensor | Measures ΔP across filters or ducts | 4–20 mA | 80 × 40 × 30 | 0.22 |
| FTL300 Flow Sensor | Air Flow Measurement Sensor | Monitors airflow rates | Pulse / Analog | 95 × 60 × 35 | 0.28 |
| TCR600 Temperature Probe | Temperature Sensor | Wide temp range sensing | 4–20 mA | 60 × 20 × 15 | 0.12 |
| RH600 Humidity Sensor | Humidity & Temp Sensor | Dual humidity & temperature | Digital | 45 × 45 × 15 | 0.10 |
8. Frequently Asked Questions (FAQ)
Q1: What does the Honeywell 621-2150 measure?
A1: This sensor measures gauge pressure, which is the pressure relative to surrounding atmospheric pressure. It is used where relative pressure feedback is needed in control and monitoring systems.
Q2: What output options are available on this model?
A2: The 621-2150 provides selectable analog outputs: 4–20 mA current loop or 0–10 VDC voltage output, depending on the needs of the control system.
Q3: What is the pressure range of the 621-2150?
A3: The nominal pressure range for this model is 0 to 1500 PSI, making it suitable for a wide set of industrial pressure monitoring tasks.
Q4: How accurate is the sensor?
A4: The typical accuracy is ±0.5% of full scale, meaning that the measured pressure is within half a percent of the actual value across the specified range.
Q5: What media can be measured?
A5: The sensor is suitable for air, inert gases, and many non-corrosive hydraulic fluids. Check fluid compatibility for specific applications.
Q6: What is the temperature range for operation?
A6: The 621-2150 operates reliably from –40°C up to +125°C, supporting installations in very cold or very hot environments.
Q7: What mechanical and electrical interfaces does it use?
A7: It uses a standard 1/4″ NPT male mechanical connection and a sealed industrial 3-pin electrical connector for secure wiring.
Q8: Is this sensor water and dust resistant?
A8: Yes. With an IP67 rating, it resists dust ingress and temporary immersion in water, suitable for wet or dusty environments.
Q9: How should the sensor be installed for best performance?
A9: Install the sensor with proper sealant on threaded connections, avoid excessive vibration, and protect electrical connections from moisture to ensure accurate readings over time.
Q10: What industries commonly use the 621-2150?
A10: Industries such as manufacturing automation, mobile machinery, HVAC and refrigeration, water treatment, and general process control use this sensor for reliable pressure measurement.