Self-refilling automatic syringes with spring-loaded plunger allow repetitive delivery of aliquots from a single reservoir.

Corrosion-resistant stainless steel plungers offer a high degree of chemical resistance with no O-ring to replace. Handle design eliminates fatigue during extended operations. Two-ring or pistol-grip handles are available. Detachable valve system has corrosion-proof springs and stainless steel check-valve balls to ensure a repetitive accuracy of ±1%. Replaceable ground glass barrel with Viton® washers resists corrosion. Luer lock nozzle. Autoclavable.