Found in American documentation from the 90s, this circuit uses a high voltage relay and has no grid isolation. The high values of R1 and R2 prevent the shock when it touches the sensors.
This circuit was found in documentation from the 80s. The circuit did not include resistors from...
This circuit used in instrumentation is suggested by National Semiconductor, now Texas Instruments and...
The source shown in the figure provides output voltages in the range of 1.2 to 25 V with currents up...