Electric Field Meter 200 is a professional instrument to measure electrostatic and alternating electric fields. The instrument has a wide dynamic range with automatic gain setting. Electrostatic field measurements are made using a built-in field mill probe. Alternating electric fields are measured using a special probe. Two different frequency ranges are available; ELF (5-2,000Hz) and VLF (2-400kHz). The instrument is powered by a built-in chargeable sealed lead-acid battery. The built-in communication interface (RS232) can be used to transfer stored results to a printer or a computer. The options available with the instrument are: » Fiberoptic interface kit for remote control operation. » Probe to check instrument calibration. The electronics in the instrument comprise analog amplifiers, a microcomputer with communication peripherals and an alphanumerical LCD-display with back light. A built-in clock and calendar is used in the data logging measurement modes.