Digital oxygen monitor DOM-01 141-008 1 unit

Suitable for 6th grade elementary school science classes on "The structure and function of the human body," "The mechanism of combustion," and "Living things and the environment." Measurement range: 0 to 50%* Resolution: 0.1% Accuracy: 5% of reading Power supply: 2 AA batteries (not included) Sensor: SIEMENS mercury-free air battery PR44 Probe length: 800mm Display: LED lights up when air battery is nearing the end of its life Hold function available Air battery: Total usage time 30 hours or 30 days after removing the protective sticker (not included) *When the total usage time of the air battery is 5 hours or more. *Air batteries are sold separately. Please purchase the Siemens Signia hearing aid battery PR44(675). Product code: 141-008