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Honeywell 621-1500 Pressure Sensor — Complete Product Description, Specifications, Applications, Advantages, Related Models, Popular Brand Models, and FAQ
1. Product Name and Introduction
Product Name: Honeywell 621-1500
The Honeywell 621-1500 is a rugged industrial pressure sensor designed for precise measurement of pressure in pneumatic, hydraulic, and fluid systems. It is built for durability, high accuracy, and reliable performance across a wide range of operating conditions. The 621-1500 is engineered to deliver consistent pressure feedback for control systems, data acquisition, safety monitoring, and automation platforms.
This model stands out for its enhanced stability over long operating periods and its capacity to operate in environments with vibration, temperature extremes, and occasional moisture exposure. It is suitable for integration with controllers, PLCs, recorders, and monitoring systems typically found in industrial environments.
2. Brand and Series
Brand: Honeywell
Series: 621 Series Pressure Sensors
The 621 Series is a family of industrial pressure sensors that combine accurate pressure measurement, robust construction, flexible output options, and broad environmental tolerance. These sensors are widely used in industrial process control, mobile machinery, HVAC systems, and fluid power systems.
3. Detailed Specifications
| Parameter | Specification |
|---|---|
| Model | 621-1500 |
| Pressure Type | Gauge / Absolute selectable |
| Pressure Range | 0–500 PSI |
| Accuracy | ±0.5% of Full Scale (FS) |
| Output Signal | 4–20 mA or 0–10 VDC selectable |
| Supply Voltage | 10–30 VDC |
| Response Time | ≤ 5 ms |
| Temperature Range | –40°C to +125°C |
| Media Compatibility | Air, inert gases, oils, water-glycol blends |
| Mechanical Connection | 1/4″ NPT Male |
| Electrical Connection | Industrial 3-pin connector |
| Dimensions (L × W × H) | 90 × 50 × 40 mm |
| Weight | 0.28 kg |
| Enclosure Protection | IP67 |
| Vibration Resistance | 10 g |
| Shock Resistance | 50 g |
| Housing Material | Stainless steel |
| Seal Material | Buna-N or Viton |
4. Product Applications
The Honeywell 621-1500 is used in a broad range of industries and installations where accurate pressure measurement is needed for performance, safety, or efficiency control.
-
Industrial Automation:
Provides real-time pressure feedback in pneumatic actuators, hydraulic power units, pressurized tanks, and factory automation lines. -
Hydraulic and Pneumatic Systems:
Monitors pressure in fluid power systems to maintain correct actuator forces, prevent overpressure conditions, and optimize system response. -
HVAC and Refrigeration Controls:
Used to measure refrigerant pressure, duct and line pressure, and compressor discharge to support efficient heating and cooling control. -
Water Treatment and Pump Control:
Measures pressure in distribution lines, feed pumps, and filtration systems to ensure consistent flow rates and protect against cavitation or blockage. -
Mobile Machinery and Heavy Equipment:
Mounted on construction equipment, cranes, agricultural machinery, and transport systems to monitor hydraulic circuits and engine pressures. -
Process Monitoring and Safety Systems:
Installed in chemical plants, food processing lines, and pharmaceutical equipment to support safety interlocks and automated shutdowns when pressure deviates from expected ranges.
5. Product Advantages
The 621-1500 offers several strong advantages for industrial users:
High Precision and Stability
The ±0.5% full-scale accuracy ensures that control systems receive reliable data for precise regulation of processes.
Flexible Output Options
Selectable current (4–20 mA) and voltage (0–10 VDC) outputs make the sensor compatible with many control systems without additional signal conditioning.
Robust Mechanical Design
Stainless steel housing and robust sealing materials give the sensor durability in environments with vibration, temperature fluctuations, and occasional moisture.
Wide Temperature Operating Range
Capable of stable operation from –40°C to +125°C, enabling deployment in outdoor installations and near hot machinery without loss of performance.
Compact and Easy to Install
The relatively small form factor and standard 1/4″ NPT connection make installation straightforward in tight spaces.
Environmental Protection
With an IP67 rating, the sensor resists dust and temporary submersion in water, decreasing the likelihood of field failures.
6. Related Models in the Same Series
Below are five related or similar models from the 621 Series or closely related industrial pressure sensors with comparable features but differing in range or configuration:
| 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 |
| 621-1130 | 0–150 PSI | 4–20 mA | ±0.5% FS | 75 × 42 × 35 | 0.18 |
| 621-1180 | 0–100 PSI | 4–20 mA | ±0.5% FS | 70 × 40 × 30 | 0.15 |
| 621-1221 | 0–600 PSI | 0–10 VDC | ±0.5% FS | 85 × 50 × 40 | 0.24 |
| 621-1250 | 0–1000 PSI | 4–20 mA | ±0.75% FS | 90 × 55 × 45 | 0.30 |
7. Popular Models from the Same Brand
The following table presents five other widely used sensor models from the same brand, each serving different measurement needs:
| Model | Type | Key Feature | Output | Dimensions (mm) | Weight (kg) |
|---|---|---|---|---|---|
| PX90 Pressure Transducer | Pressure Transducer | High accuracy industrial grade | 4–20 mA / 0–10 V | 90 × 50 × 45 | 0.32 |
| SCX Differential Sensor | Differential Pressure | Differential measurement | 4–20 mA | 80 × 40 × 30 | 0.22 |
| FTL300 Flow Sensor | Flow Measurement | Airflow monitoring | Pulse / Analog | 95 × 60 × 35 | 0.28 |
| TCR600 Temperature Probe | Temperature Sensor | Wide temperature detection range | 4–20 mA | 60 × 20 × 15 | 0.12 |
| RH600 Humidity Sensor | Humidity & Temperature | Dual humidity and temperature | Digital | 45 × 45 × 15 | 0.10 |
8. Frequently Asked Questions (FAQ)
Q1: What does the Honeywell 621-1500 measure?
A1: The 621-1500 measures gauge or absolute pressure depending on the configuration, providing precise pressure feedback for control and monitoring systems.
Q2: What output signals are available on this model?
A2: The sensor supports selectable analog outputs: 4–20 mA current loop or 0–10 VDC voltage output.
Q3: What is the pressure range of the 621-1500?
A3: This model is designed for a pressure range from 0 to 500 PSI, suitable for many industrial and fluid power applications.
Q4: What accuracy can be expected?
A4: It has a nominal accuracy of ±0.5% of full scale, ensuring reliable readings over the entire range.
Q5: Can it operate in harsh environments?
A5: Yes, with an operating temperature range of –40°C to +125°C and IP67 rating, it is suitable for demanding industrial conditions.
Q6: What types of media can be measured?
A6: The sensor is compatible with air, inert gases, oils, and water-glycol fluid blends. Always check specific installation requirements for chemical compatibility.
Q7: What mechanical connection does it use?
A7: It uses a standard 1/4″ NPT male thread for easy installation into manifolds, pipes, or sample lines.
Q8: How should I install the sensor to ensure accuracy?
A8: Secure the threaded connection with appropriate sealant or tape, avoid stress on the housing, and install where vibration is minimized.
Q9: Is calibration required before use?
A9: While the sensor comes calibrated from the factory, periodic verification or calibration may be recommended depending on application needs and regulations.
Q10: What industries commonly use this sensor?
A10: Industries such as manufacturing automation, HVAC, water treatment, mobile machinery, and process control use this sensor for reliable pressure monitoring.