A simple method for measuring the electrostatic charge of powder particles in a powder cloud sprayed from an electrostatic powder‐coating gun is described. Powder particles accompanied with ions were drawn into an insulator suction pipe and their charge was measured after they passed through the pipe by employing the suction‐type Faraday Cage. Most ions are eliminated by both electrostatic repulsion force against the charged tip of the pipe and charge recombination against the pipe wall. The suction pipe had almost no effect on the measured value for powder charge.
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