TAKEX HD Series Separate-Amplifier Hot Metal Detection Sensors

• Four hot metal detection models: HD301A supports targets from 370°C, HD601N from 650°C, while HD400 and HD502F provide fiber-type sensing options for different temperatures and installation conditions.
• Separate amplifier design: The sensing section is separated from the HDA300A amplifier, allowing the amplifier to be installed away from the hot-material detection area without a water-cooled amplifier system.
• Heat-resistant fiber options for HD400: HD400 supports GT205, GT21, GT22, and GT23 heat-resistant fibers rated for ambient temperatures up to +200°C, with FA51 or FA52 lens units available to extend detecting distance.
• Ultra-fine fiber structure for HD502F: A glass fiber covered by a Φ1.1 mm stainless-steel tube enables focused detection of localized heating conditions on electronic components and mechanical parts.
• Multifunction amplifier control: The HDA300A provides three-level received-light indication, sensitivity adjustment, relay and 12VDC voltage outputs, plus on-delay, off-delay, and one-shot timer functions.

Q1: What is the HD Series?
A: The HD Series consists of separate-amplifier hot metal detection sensors that use infrared radiation emitted from heated steel, glass, and other hot materials for non-contact presence, passage, and heating-condition detection.

Q2: Which models are available in the HD Series?
A: The current lineup consists of HD301A, HD601N, HD400, and HD502F, with different minimum target temperatures, sensing structures, and environmental ratings.

Q3: What is the difference between HD301A and HD601N?
A: HD301A is a low-temperature model for targets from 370°C with a sensing-head ambient limit of +50°C. HD601N supports targets from 650°C and a sensing-head ambient temperature up to +70°C.

Q4: What is the minimum detectable temperature of HD400?
A: It depends on the installed fiber. GT205 supports 430°C or higher, GT21 440°C, GT22 460°C, and GT23 490°C or higher.

Q5: Can HD400 fibers operate in high-temperature environments?
A: Yes. GT205, GT21, GT22, and GT23 fibers are rated for ambient temperatures from -20 to +200°C.

Q6: What is special about HD502F?
A: HD502F uses an ultra-fine glass fiber covered by a Φ1.1 mm stainless-steel tube. It detects targets from 560°C and is suited for focused detection of localized heating on electronic or mechanical parts.

Q7: Which amplifier is used with the HD Series?
A: All four models use the HDA300A amplifier, which provides received-light indication, sensitivity adjustment, relay output, and 12VDC voltage output.

Q8: What timer functions are available?
A: On-delay, off-delay, one-shot, and timer-disabled modes are available, with selectable ranges of 0.1–1 s and 1–10 s.

Q9: What are the output response times?
A: The relay output response time is 25 ms, while the 12VDC voltage output responds in 3 ms.

Q10: What applications is the HD Series suitable for?
A: The series is suitable for presence and passage detection of hot materials in steel, glass, and heavy-industry equipment. HD502F can also detect localized heating conditions on electronic and mechanical components.