Our Product: A High Impedance Voltage Probe System
This system interfaces directly to your digital multimeter (1 megohm or better input impedance), so all the capabilities of your existing multimeter can be used with this probe. The unit runs on AA batteries (500 hour battery life) and you easily calibrate it to work with your digital multimeter.
Our 10 gigohm shielded probe offers 1000x less circuit loading than a standard 10 megohm input impedance digital multimeter, and low loading is essential when designing and debugging micropower electronic devices. Capacitive loading measures 3.3pF, and inductive loading is negligible. Solid length of the needle-sharp tip is 2 inches (50mm max), half of this inside the probe shield.
The probes are 1:1 with a range of +/-5VDC, and can offer the patient and careful user accuracy to 1mV or better. Due to the very high input impedance, patience and care is required in the use of this probe system.