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There are two types of replacement sensors available for the Zenith. To prevent us from sending you the wrong sensor, please conduct a simple check on your unit.
Open the back panel on your Zenith breathalyser. You will see either one of the sensors below.
If your breathalyser shows a similar image to the left image, you need the Pressure Sensor. If your breathalyser looks similar to the right image, you need the Non-Pressure Sensor.
Please refer to the image above and select the appropriate sensor above before adding to cart.