I have the SPER-1E voltage reader. Calibration valid through May 2020 with certified reference electrets.
Six electrets with S-Chambers.
Three tamper resistant twin boxes with tamper tape and zip ties.
A nitrogen cleaning kit. I am including a tank for nitrogen. Refillable at welding shops for cheap.
Flash Drive with report software.
Digital tamper monitor which measures movement, temperature, pressure changes, etc…
Over $3,000 in equipment. I am seeking $1,500.