Core Functions of Hot Metal Detector (HMD)

1. Accurate Detection of High-Temperature Metals: By sensing the infrared energy radiated by metals at high temperatures (usually ≥300℃), it quickly identifies hot metal targets without being affected by metal material or surface conditions (scale, gloss). With a detection response time of ≤10ms, it ensures real-time capture of high-speed moving hot metals.
2. Multiple Signal Output and Control: Supports switching signal output (relay contacts, NPN/PNP level), which can be directly connected to automatic control systems such as PLC and DCS to realize signal feedback of hot metal arrival and departure, meeting industrial needs such as interlock control, counting statistics, and process start-stop; some high-end models support analog output to feed back metal temperature trends.
3. Strong Anti-Interference and Environmental Adaptability: Built-in infrared narrowband filtering technology effectively resists environmental interference such as sunlight, workshop lighting, steam, and dust, with anti-light interference intensity up to 10000Lx or more; protection class ≥IP54, enabling stable operation in harsh industrial environments of -25℃～85℃ and resisting vibration, oil pollution and other working conditions.
4. Self-Inspection and Alarm Functions: Equipped with self-diagnosis capabilities for power supply abnormalities and sensor failures, it indicates equipment status through indicator lights or alarm signal output, facilitating maintenance personnel to troubleshoot problems in a timely manner and ensuring continuous operation of the production line.
5. Flexible Adaptation to Working Conditions: Supports adjustable detection distance (usually 0.1m～10m) to meet the installation needs of different production lines; some models have adjustable detection thresholds, enabling accurate identification of hot metals in different temperature ranges and compatibility with low-speed to high-speed (≤1000m/min) moving metal workpieces.

Application Scenarios

1. Iron and Steel Metallurgy Industry: Suitable for continuous casters, hot rolling production lines, and section steel production lines. It detects the position and movement status of billets, steel coils, and steel strips, realizing automatic interlocking of billet cutting, roller table conveying, flying shear control, coiler start-stop and other processes; it can also be used for hot metal flow detection at blast furnace tapping holes and converter tapping holes to ensure operational safety.
2. Machinery Processing and Heat Treatment Industry: In forging and casting production lines, it detects the conveying position of high-temperature workpieces to control the start-stop of robot grabbing and conveying devices; at the inlet and outlet of heat treatment furnaces, it identifies the entry and exit status of hot metal workpieces to realize automatic control such as furnace temperature adjustment and conveying speed matching.
3. Building Materials and Non-Ferrous Metals Industry: Used for hot material detection at the clinker outlet of cement rotary kilns and high-temperature glass ribbon position identification in glass production lines; in smelting and rolling production lines of non-ferrous metals such as aluminum and copper, it detects the movement trajectory of high-temperature profiles and billets to ensure accurate linkage of rolling, cutting and other processes.
4. Other Industrial Scenarios: In the high-temperature material conveying links of waste incinerators and industrial boilers, it detects the presence and position of hot materials; in welding production lines, it assists in identifying high-temperature weld areas and cooperates with welding equipment to achieve precise operations.