I. The most cost-effective solution: A domestic Hall effect displacement sensor solution
The total cost of each unit is approximately 80-150 RMB, which is less than one-tenth of the cost of imported products with comparable performance.
Core advantages: Non-contact measurement, no mechanical wear, unaffected by dust, oil, or moisture, suitable for high-temperature and high-pollution environments around hot runners.
A structure that is simple, robust, and vibration-resistant, with a response frequency of up to tens of kHz, is entirely capable of meeting the low-speed dynamic monitoring requirements of thermal expansion displacement in hot runners.
Compact in size, it can be immediately installed in the narrow space on the side of the hot runner plate without the need for large-scale mould modifications.
Suitable scenarios: Ninety percent of conventional precision injection moulding hot runner production lines, which do not necessitate high-precision micron-level measurement, are required to monitor whether thermal expansion displacement exceeds limits and provide an early warning.
II. The Hongchuan HC8-400-H Economic Laser Displacement Sensor Solution: The Optimal Solution for High-Temperature Special Scenarios
The total cost of each unit is approximately 300-500 RMB, which is only 60%-70% of the cost of imported laser sensors with comparable performance.
Core Advantages: Can be installed directly near the hot runner without the need for an auxiliary cooling system, and it supports a wide operating temperature range of -10~80℃.
The built-in Modbus protocol enables direct communication with existing PLCs, thereby eliminating the necessity for additional amplifier controllers and reducing hardware expenses.
IP67 protection rating, which is appropriate for injection moulding workshop environments that are dusty and humid, and has a strong long-term operational stability.
Suitable Scenarios: High-temperature conditions in which the ambient temperature around the hot runner is consistently above 50℃, and in which conventional Hall effect sensors are unable to operate reliably.
III. Arduino Self-Made Hall Effect Displacement Sensor Solution: An Extremely Low-Cost Maker Solution
Total Cost: The total cost per unit can be maintained at or below 50 RMB, as all materials are open-source, general-purpose electronic components.
Core Advantages: Completely self-constructed, with customisable dimensions to accommodate specific installation spaces, and adaptable to confined locations.
Directly integrates with your current calibration system, which is based on Python open-source libraries, and does not necessitate any additional paid software licenses.
Suitable Scenarios: Suitable for R&D testing scenarios with basic electronic development capabilities, small-batch pilot installations, and that are exceedingly budget-conscious.
In conclusion, the majority of traditional hot runner production lines prioritise Hall effect displacement sensor solutions that are domestically produced. This approach achieves an optimal balance between cost, stability, and adaptability, thereby fully satisfying the fundamental requirements for thermal expansion displacement monitoring and early warning.
