DATELs new DMS-20PC-FM Series are the world’s smallest, self-powered, ac frequency meters. Simply connect the ac line to the two rear input terminals, and the unit is fully operational with no additional components or auxiliary power required! Two, 50/60Hz models operate over input voltage ranges of 85-140Vac or 170-264Vac. A third, 400Hz model operates over an input voltage range of 85-140Vac. Despite their small size (1.38" x 0.88" x 1.0"), DMS-20PC-FM meters feature large 0.40"/10.2mm red LEDs that can be easily read from 15 feet away.

Features
• Self-powered, no external supplies required
• 3 models: 47.0-99.0Hz (85-140Vac) 47.0-99.0Hz (170-264Vac) 350-450Hz (85-140Vac)
• Screw terminals simplify panel mounting
• Ideal for emergency power equipment
• Small 1.38" x 0.88" x 1.0" packages
• Epoxy encapsulated for harsh environments
• Large (0.40"/10.2mm) red LED displays