According to Temple Grandin (2015), a minimum of 1.25 amps must pass through a pig's brain to reliably induce insensibility. In sheep, 1 amp is required. The best electric stunners use an amperage regulated circuit. Older style circuits are voltage regulated. These circuits are inferior because they allow large amperage surges which can fracture bones and allow blood splash.
According to Robert Maddock in Meatingplace (3/21/11), scientific research has shown that an electrical stunner must have sufficient amperage to induce a grand mal seizure to insure that the animal will be made instantly insensible. For market weight hogs a minimum of 1.25 amps is required. To deliver sufficient amperage, 250 volts is the recommended voltage for hogs to insure insensibility. Hogs will vary in fat thickness so an electric stunner that is voltage regulated will apply varying amounts of amps at the same voltage setting as the fat thickness
Below is a PowerPoint presentation on the advantage of Constant Amperage Stunners over Voltage Regulated Stunners
The TBG 100 and TBG 200 stunners are constant amperage stunners. Other electric stunners, where you can only adjust the voltage, leads to variation in amperage during stunning of the animals due to:
The power supply needed to the stunner is 110 volts, 16 amp, 60 HZ.
Last update September 14, 2021