Programmable digital meters with multicolour bargraph indicators are destined to measure and recording d.c. current, d.c. voltage, temperature, resistance and other non-electrical magnitudes like: level, flow, pressure, humidity converted into electrical signal. Very well visualization of the process is possible through using in meters 3 and 7-coloured bargraph built with diodes made in the gallium nitride technology. Basic technical details: - input: programmable - voltage, current, thermocouple, resistance thermometers, 0...4/10 ohm - output: programmable - analog, relay, RS-485 with MODBUS protocol. Next to programmable measuring functions meters have many additional functions: - evaluation of the input signal into the indication on the base of the individual linear characteristic, - arithmetical: raising to a power, extraction of roots (operations in channels: summation, subtraction, multiplication, division), - programming of the bargraph colour and resolution, - signalling of the set alarm value exceeding, - recording of the measured signal in programmed time intervals, - memorisation of maximal and minimal values, - programming of the measurement averaging time, - programming of the indication resolution.