Question 1

What is the difference between a fuel cell sensor and a semiconductor sensor?

Accepted Answer

Fuel cell sensors use platinum electrodes to measure alcohol with high accuracy. Ethyl alcohol is oxidised into acetic acid, generating a current that determines your reading.

Semiconductor sensors also measure alcohol but are less precise, as other substances can mimic alcohol, leading to skewed results. Fuel cell sensors are preferred by law enforcement for their precision and longer calibration intervals.

Question 2

Why does my breathalyser detect alcohol after using mouthwash?

Accepted Answer

Mouthwash contains ethanol, a type of alcohol, which can trigger a reading. Wait 10–15 minutes after using mouthwash, eating, or drinking anything (including non-alcoholic beverages) for accurate results.

Question 3

How long should I wait after drinking before using my breathalyser?

Accepted Answer

Wait at least 20 minutes. Alcohol takes time to absorb into the bloodstream and expel through breath. Testing too soon may lead to inaccurate readings or unnecessary sensor saturation.

Question 4

What should I do if I get a 0.049% BAC reading?

Accepted Answer

Avoid driving with any alcohol in your system. BAC levels can rise for up to two hours after your last drink as alcohol continues to absorb. Test again after 10 minutes to check if your BAC is increasing or decreasing.

Question 5

Why do I get a 0.00 BAC reading after two drinks?

Accepted Answer

Most people record a low or mid-level BAC after two drinks. However, factors such as metabolism, body weight, and time since drinking can lead to a 0.00 reading. On average, one standard drink is processed every hour.

Question 6

Why do my partner and I have different readings after drinking the same amount?

Accepted Answer

BAC readings differ based on individual factors like weight, gender, metabolism, medications, and whether you’ve eaten. Even with identical alcohol consumption, these variables affect how alcohol is processed.

Question 7

How often should I recalibrate my breathalyser?

Accepted Answer

Recalibrate every 200 uses or 12 months, whichever comes first. Even with infrequent use, accuracy can drift over time.

Question 8

Can I recalibrate my breathalyser locally?

Accepted Answer

All recalibrations are conducted at AlcoLimit’s Gold Coast service centre using specialised equipment for precision. However, models with SRS (self-replaceable sensor) technology allow you to replace the sensor yourself.

Question 9

Do I have to post my breathalyser for recalibration?

Accepted Answer

Yes, our service centre performs recalibration with a fast two-day turnaround. SRS-enabled models allow for user-replacement of pre-calibrated sensors.

Question 10

How much does recalibration cost?

Accepted Answer

Recalibration costs range from $30 to $85, depending on the model. Fees include express return postage.

Question 11

Why does my breathalyser show an error message?

Accepted Answer

Common errors include:

BAT: Low battery – replace with alkaline batteries.
SEN or ER4: Sensor issue – return to AlcoLimit for servicing.
FLO: Insufficient breath flow – blow firmly and steadily into the mouthpiece.

Check the instruction manual for additional error codes.

Question 12

Why does my breathalyser turn off quickly after turning it on?

Accepted Answer

This happens when carbon batteries are used instead of alkaline. Always use 1.5V alkaline batteries for optimal performance.

Question 13

Can I buy replacement mouthpieces?

Accepted Answer

Yes. Mouthpieces are available in packs of 10, 50, or 250 from our Accessories page or selected retailers. Order extras when recalibrating to ensure you always have clean ones on hand.

Question 14

Why is my breathalyser slow to start or pauses during countdown?

Accepted Answer

The device warms the sensor to 34°C to match breath temperature for accuracy. If countdowns take unusually long, the sensor may have alcohol residue build-up and require recalibration.

Question 15

Why am I getting a reading in the morning if I haven’t drunk the previous night?

Accepted Answer

Alcohol-based products like toothpaste or mouthwash can trigger readings. Avoid eating, drinking, or smoking for at least 10 minutes before testing.

Question 16

Why are the mouthpieces I ordered different from the originals?

Accepted Answer

Our mouthpieces are redesigned for better fit, hygiene, and flow accuracy. They are slightly longer and sit more securely in the unit.

Question 17

Can I install an Enforcer 2 sensor into an Enforcer 3 or Platinum breathalyser?

Accepted Answer

No, each sensor is uniquely designed and calibrated for its specific model.

Question 18

Can I clean the sensor in my breathalyser myself?

Accepted Answer

No, sensors require specialised cleaning. Models with SRS technology allow sensor replacement. Others must be sent to our service centre.

Question 19

I dropped my breathalyser and damaged it. Can it be repaired?

Accepted Answer

Yes, damaged parts such as screens or battery latches can be replaced. Contact our service centre at 1300 667 661 for assistance. Minor parts may be replaced free of charge or for a nominal fee.

Question 20

How do I pay for recalibration?

Accepted Answer

We offer several payment options:

Credit card (via phone or PayPal).
EFT (request an invoice for bank details).
Money order (enclose with the unit).

Breathalyser FAQs

Your Complete Guide to Breathalyser Usage, Maintenance, and Accuracy