Spirette, the world famous no maintenance consumable (a combination of filter, mouth piece and tube)
#2050-1 Case of 50 NDD Spirettes List price $95.00
#2050-5 Case of 200 NDD Spirettes List price $350
# 2030-2 3 L Calibration Syringe with Adapter List price $340.00
A calibration check of the spirometer should be completed prior to performing any tests. The use of a calibrated 3 Liter syringe and adapter for the spirette is required
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Although the NDD EasyOne does not require calibration, NIOSH and ATS standards require the Spirometer be "checked for accuracy prior to each days use.