The Shimpo DT-207B is a handheld digital tachometer delivering non-contact and contact rotational speed measurement for industrial monitoring and quality control. Using a visible light LED beam and photo-transistor sensor, it captures RPM data with ±1 digit accuracy across a wide measurement envelope. The instrument features a 5-digit LED display (0.4 inches high) with floating decimal and dual measurement modes: non-contact operation up to 30,000 RPM at distances to 2 feet, and contact measurement via threaded adapter up to 5,000 RPM. A single-chip C-MOS microcomputer manages readings with a 1-second update interval.
Technical Specifications
Measurement Range:
• Non-contact: 6.0 to 30,000 RPM
• Contact: 6.0 to 5,000 RPM
Accuracy: ±1 digit across all measurement ranges
Display: 5-digit LED, 10 mm height, floating decimal point
Detection System: Visible light LED beam with photo-transistor sensor; effective distance 0.6 m (2 feet). Single reflective tape tab applied to rotating target.
Memory: Stores last reading for 10 seconds with 4-minute recall window; captures four intermediate readings, maximum, and minimum values automatically; accommodates up to 4 manually selected readings with “M” indicator.
Update Rate: 1 second
Power: 4 × 1.5 V AA batteries (included); 6 hours continuous operation
Operating Temperature: 0°C to 45°C (32°F to 120°F)
Physical: Die-cast aluminum housing; 172 × 61 × 51 mm; 450 g
– Key Features
• Dual measurement modes eliminate setup complexity for shaft and surface applications
• Low voltage indicator (“LO BAT” or “B” display) signals battery depletion
• Automatic data memory with manual selection capability
• Compact form factor rated for field use
– Typical Applications
• Motor speed verification and commissioning
• Bearing and spindle diagnostics
• Process control feedback in manufacturing
• Maintenance troubleshooting on rotating equipment
– Compatibility & Integration
Optional cone rubber tip adapter enables direct contact measurement on shaft surfaces. Non-contact operation requires single reflective tape application to target surface.
