Monarch Instrument, 6210-021, Nova-Strobe PBX Phaser Advanced Digital Portable StroboscopeIncludes:Stroboscope - 30-50,000 FPM with PSC-pbxU (115 / 230 VAC)Power Supply / Recharger + spare lamp and deluxe water tightO-ring sealedFoam lined latching carry caseNIST certificateFeatures:Flash rates from 30 to 50,000 flashes per minute, The all digital, crystal controlled microprocessor keeps readings rock steadyTimes 2 and divide by 2 push buttons allow easy checking for RPM harmonics and allow stop motion far beyond the 50,000 fpm limitStore and recall up to 9 user selectable values. Last measurement memory, even with the power off.Individual in and output TTL jacks provide power to remote sensors and allows "daisy chaining" multiple strobes. A Tachometer mode allows accurate speed measurement up to 200,000 RPM using external sensors.Dual-function delays in external mode. Delays adjustable as phase angle or time with resolution to 0.1 degree and 0.0001 seconds.Auto step mode provides slow motion appearance for high speed repetitive event.Backlit alphanumeric LCD display shows flash rate in flashes per second or flashes per minute and delays in degrees or milliseconds.The Phaser-Strobe PBX incorporates the unique design features of the Nova-Strobe dbx with an increased operating range of 30 to 50,000 flashes per minute, as well as external phase- shifting. The unique digital adjustment knob can select the decade for adjustments, so coarse and fine adjustments of flash rates are made quickly and with significantly better resolution than competitive units. The memory feature of the Phaser-Strobe pbx allows nine flash rates to be stored - displayed in flashes per minute or flashes per second. Phaser-Strobe pbx operates with internal rechargeable batteries or continuously from AC line power with the power supply / recharger.