840-C MKS Instruments Handheld Optical Power Meter

The Model 840-C is a powerful handheld dual-microprocessor based optical power measuring instrument. It makes sensitive DC or AC Peak-to-Peak optical power measurements with the convenience of full spectrum sensor calibration, quick sensor change, and a host of user-friendly features.

The Model 840-C operates with Newport's line of optical detectors through the use of an in-line calibration module. This Cal Module supplies calibration and detector information while still allowing the detector to be detached and used with other equipment in the lab. For use in fiber optic applications, a combined detectorcalibration module provides connectorized input at the meter (Model 818-F Series modules).

The Model 840-C has been designed with the most frequently used keys placed within natural reach. A backlit 4-digit liquid crystal display (LCD) permits easy reading in darkened areas. An audio indicator allows the user to maximize a signal without having to look at the display. The analog output allows other instrumentation to monitor the Model 840-C power readings by providing a voltage output proportional to detector current. The Model 840-C's ultra low noise, thermally stable, transimpedance input amplifier optimizes the detector sensitivity and linearity.