Sensor Module- AL-3100- AL-3500 Breathalyzer Accessories There is a small panel

There is a small panel that opens exposing the sensor and in seconds you can replace your old sensor with a new Pre-Calibrated sensor module

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This New model is the newest and lowest price Dollar bill vending breathalyzer on the market today with the latest cutting edge technology at a very affordable price

and NHTSA standards)

Sensor Module- AL-3100- AL-3500 Breathalyzer Accessories There is a small panelNOTE: For Quantity Discounts click the "Discount Drop Box". This is the SCREW DOWN type Pre Calibrated sensor module: 2008 and later models of the AL 3100 AL 3500 ONLY! Sensor life usually between 300 500 tests. Simply change the sensor just like changing a battery! Installs in seconds, just snap out and snap in!