The Transforming Technologies EFM115 Pocket Static Fieldmeter and Ionizer Performance Analyzer is a convenient electrostatic field meter that is used to locate and measure static charges and test the balance of air ionizers. It has a compact design with four buttons that makes it easy to operate. The Transforming Technologies EFM115 Pocket Static Fieldmeter measures static voltages within ± 20kV (20,000V) at a distance of 1". The results are displayed simultaneously numerically and in a bar graph format on an easy to read LED screen. The two LED guide ring lights helps position the field meter at the right distance from a charged test object. This static field meter can be used to measure low voltages up to 200V in ion balance mode with a built-in charge plate. The combination of field meter and ion balance tester make the EFM115 the ideal meter for static audits and periodic verification of ionizers. It meets the requirements per compliance verification ESD TR53 and conforms to ANSI/EOS/ESD (S4.1, S7.1, S12.1, S2.1).