| Items | ESS-B3011 specifications | ESS-L1611 specifications | 
| Polarity | Positive or Negative | 
| Output voltage | 0.2 to 30.0kV +/-5%
(30.5kV maximum)
0.2 to 10kV: 0.05kV step
10.0 to 30.5kV: 0.10kV step | 0.2 to 16.0kV +/-5%
0.2 to 10kV: 0.05kV step
10.0 to 16.0kV: 0.10kV step | 
| Repetition cycle | 0.05 to 99.9s (+/- 10%) /Manual
0.05 to 10.0s: 0.05s step
10.0 to 99.9s: 0.10s step | 
| No. of time of discharge | 1 to 999 times /continuous | 
| Discharge mode | Contact discharge/ Air discharge | 
| Trigger mode | Gun trigger / Main unit trigger | 
| Operation panel | Indicator: 5x7 dot matrix LED
Operation: Push-buttons (Partially lighting) | 
| Radiation mode select switch | Extra / Normal switching function built-in | 
| Discharge detection | Discharge detection function in air-discharge mode | 
| Pre-checking function | High voltage output checking
(by user operation.  Not the calibration but just checking) | 
| CR & Gun head checking | CR constant and gun head recognizable (with an indicator to prevent the wrong combination) | 
| IEC level switching function | Contact discharge mode: 2.0, 4.0, 6.0, 8.0 kV step
Air discharge mode: 2.0, 4.0, 8.0, 15.0 kV step | 
| Warning lamp | Lights up while the HV circuitry is on.
Blinks while discharges are in progress. | 
| Charging capacitor and resistance | 150pF+/-10%, 330 ohm +/-10% (built into Discharge Gun GT-30R) | 
| Main unit charging resistance | 10M ohm
(53Mohm for combination with Discharge Gun GT-30R) | 
| Power supply/ Power consumption | 100 to 240V AC  50/60 Hz +/-10%  62VA | 
| Included accessories | Instruction manual | 
| Dimensions and weight | (W)270 X (H)263 X (D)200 mm (projection excluded)
Approx. 4.6 kg |