Even though Hidex instruments are provided with convenient and easy to use quench correction methods such as the TDCR and Direct DPM sometimes improved calibration is needed. Hidex has partnered with Eckert&Ziegler to provided absolute reliability in instrument calibration. The quenched set are available as standard for tritium and carbon-14 with either toluene or DIN based scintillators. The quenched standards consist of a set of 10 variable quench level standards. The vials are flame sealed and come with NIST traceability.