Hokuyo – PH-DX-R-21 / PH-DX-R-22 / PH-DX-R-71 / PHV-10A / FHM-201 / FHV-351 (5M)

Robust Optical and Hot Metal Detection Sensors for Industrial Automation

The Hokuyo PH-DX-R series, PHV-10A, FHM-201, and FHV-351 are industrial-grade optical and hot metal detection solutions designed for harsh environments such as steel mills and material handling lines. The PH-DX-R models use modulated through-beam optical detection to reliably sense object presence with fast response times and diagnostic outputs, while the PHV-10A hot metal detector combines a rugged sensor head and heat-resistant optical fiber to detect high-temperature materials over long distances. Built with IP-rated housings, wide power supply compatibility, and strong resistance to vibration, impact, and ambient light, these products deliver stable and accurate detection for demanding industrial automation applications.

For more info, download our full technical spec.

Specifications

Specification	PH-DX-R-21	PH-DX-R-22	PH-DX-R-71	PHV-10A	FHM-201	FHV-351 (5 m)
Product Type	Through-beam optical sensors / hot metal detectors
Sensor Function	Through-beam detector (standard)	Through-beam detector (variant)	Through-beam detector (long / high-range)	Hot metal detector receiver (LED CMD type)	Sensor head for optical systems	Heat-resistant optical fiber cable (5 m)
Detection Principle	Modulated light interruption (CMD)			Through-beam infrared detection	Passive receiver head	Fiber transmission
Detection Range	Up to ~30 m	Up to ~30 m	Up to ~30 m	Up to 20 m	Dependent on amplifier	Used with PHV series
Detectable Object	Opaque object ≥ φ30 mm	Opaque object ≥ φ30 mm	Opaque object ≥ φ30 mm	Steel ≥ φ30 mm (FHM-201), ≥ φ50 mm (optional)	Steel ≥ φ30 mm	Through optical fiber
Power Source	12–240 VDC or 24–240 VAC	12–240 VDC or 24–240 VAC	12–240 VDC or 24–240 VAC	100–240 VAC	—	—
Control Output	1A relay / photomos	1A relay / photomos	1A relay / photomos	1C relay contact 250 VAC 3 A / 30 VDC 5 A, phot-coupler	—	—
Warning Output	Yes (light-reception margin)	Yes	Yes	Photcoupler (120 V / 50 mA)	—	—
Response Time	≤10 ms / ≤3 ms	≤10 ms / ≤3 ms	≤10 ms / ≤3 ms	Contact ≤10 ms / Photcoupler ≤3 ms	—	—
Operating Modes	Light-ON / Dark-ON	Light-ON / Dark-ON	Light-ON / Dark-ON	Dark-ON/Light-ON	—	—
Indicators	Power / Output / Stability	Power / Output / Stability	Power / Output / Stability	Power / Op / Warning / Level	—	—
Ambient Illuminance	≤10,000 lux	≤10,000 lux	≤10,000 lux	≤10,000 lux	—	—
Ambient Temperature	-10 to +55 °C	-10 to +55 °C	-10 to +55 °C	Amplifier -10 to +55 °C; sensor/fiber up to +200 °C	Up to +200 °C	Up to +200 °C
Ambient Humidity	45 to 85 %RH	45 to 85 %RH	45 to 85 %RH	45 to 85 %RH	—	—
Protection Structure	IP66 housing	IP66 housing	IP66 housing	Amplifier IP64, head IP66, fiber rugged	IP66	Rugged corrugated tube
Weight	~1.5 kg / pair	~1.5 kg / pair	~1.5 kg / pair	Amplifier ~950 g; sensor ~1.2 kg; fiber ~1.8 kg	~1.2 kg	~1.8 kg