Popular methods to get rid of rats
Efficacy/Disadvantages

It is said rats can survive nuclear fallout. They indeed are one of the more hard to get rid of pests. The more popular methods to get rid of rats namely poisons, bait stations and glue pads are mostly dangerous and ineffective and do not offer any permanent solution.

Poisons

Most poisons are required to be mixed with food as bait. It is reported that rats are becoming immune to most of the common rat poisons. Poison manufacturers are increasing the poison strength to compensate, which again is fraught with danger. Poisons are a eminent danger to the person preparing and handling the poison, kids who may accidently ingest them and pets which may eat a poisoned rat.

Bait stations & Glue traps

They are both bait centric. It is very common to find the bait eaten and no rat trapped. Bigger rats manage to free themselves from pads.

Rat sprays

The effect of sprays last for days to a month. It’s a recurring expense.

To summarize - When it comes to cars if you manage to kill or trap one rat, another rat will take its place. None of the previously mentioned give a 24/7 protection nor one time solution. bait eaten and no rat trapped. Bigger rats manage to free themselves from pads.

CARCAT - Ultrasound rat repellent

CARCAT Duo does not kill or trap rats. It repels them away from the car. The ultrasound emitted makes the environment unfavourable for rats to carry out their usual business of chewing wires or ducts or plastic and foam parts. The protection is 24/7 and it is a one-time solution.

Efficacy testing of ultrasound rat repellent
2 chamber tests


Test setup

2 chambers, approx. 330 sq. ft. each. Both chambers were fitted with a similar ultrasound rat repellent. During the test one or both ultrasound devices would be switched on or off. Both chambers were connected by a narrow acoustically damped tube, just enough for a rat to pass from one chamber to another. The connecting tube had a stopper which could be opened / closed to introduce a rat.

Efficacy testing of ultrasound rat repellent


  • Carcat 2 chamber tests - Step 1

    Test protocol 1

    At the start of the test Ultrasound devices in both chambers are ‘off’.

    A rat was introduced through the pipe. Once the rat chose to settle down let’s say chamber 2, the ultrasound device in the non – rat chamber (Chamber 1) was switched ‘ON’.

    Test protocol 1 observations

    The rat continued to stay in chamber 2 (with ultrasound device ‘OFF’).

  • Carcat 2 chamber tests - Step 2 -CARCAT Duo

    Test protocol 2

    Continuing from TEST 1 with the rat settled in ultrasound device ‘OFF’ Chamber 2.

    Now ultrasound device in Chamber 1 was switched ‘OFF’ and Chamber 2 device switched ‘ON’.

    Test protocol 2 observations

    The rat chose to move to Chamber 1 (with ultrasound device ‘OFF’) and continued to stay there.

  • ultrasonic rat repellent for cars - Step 3

    Test protocol 3

    Continuing from TEST 2 with the rat settled in ultrasound device ‘OFF’ Chamber 1.

    Now ultrasound devices in both Chamber 1 & Chamber 2 were switched ‘ON’ simultaneously.

    Test protocol 3 observations

    The rat chose to stay in the acoustically damped connecting tube.

how carcat duo is better than others
Table of comparision

CARCAT Duo CARCAT Other Ultrasound Rat Repellents for Cars Rat Repelent Sprays Poisons / Cakes / Chemicals Tobbaco Pouches
Protection 24/7
Note - Device is dependent on cars battery
24/7
Note - Device is dependent on cars battery
24/7
Note - Device is dependent on cars battery
Effect wares off in time(needs frequent user intervention) Bait centric (rat may or may not eat poison)/ If one rat dies generally another takes its place needs frequent user intervention) Effect wares off in time (needs frequent user intervention) / aggressive rats may resist the smell and in time become addicted to the nicotine and do more damage
Hazardous No No No Yes (Toxic) Yes (Toxic) No
Environment-friendly Yes Yes Yes No (Toxic) No (Toxic) Yes
Method Ultrasound (auditory distress) + Light strobe (Visual disturbance) Ultrasound (auditory distress) Ultrasound (auditory distress) Olfactory distress (toxic fumes) Bait centric Poison Olfactory distress (toxic fumes)
Technology Microcontroller based. (Automatic Multi band frequency spectrum technoloy ultrasound + Random pattern strobe lighting) Microcontroller based (Automatic Multi band frequency spectrum technoloy ultrasound) Analog (Fixed single frequency band) Chemical Chemical Nicotine
Pet-friendly Harmless Harmless Irritates pets Poisonous Poisonous Harmful
ROI (Return on Investment) One Time investment One Time investment One Time investment Recurrant cost / Higher user intervention Low cost / Higher user intervention Low cost / Higher user intervention
Water Ingress Protection Water spray / jet proof Water spray / jet proof No protection NA NA NA
Effectiveness / Efficacy ~94% based on customer feedback ~91% based on customer feedback ~60% Reduces over time. Rats get immune to single spectrum ultrasound 30 to 70% based on brand? Depends on
- Brand
- User
less than 40% - Hit and miss. Even if 1 rat gets killed another rat will take its place Less than 30%
Humane Factor Only repels (does not kill) Only repels (does not kill) Only repels (does not kill) Supposed to repel only but substance used is generally toxic Kills the rat (slow and painful) Supposed to repel only but high doses of nicotine is toxic
Certifications ARAI & CE ARAI & CE None None None None
Ease of Installation Simple 15 - min process Simple 15 - min process Depends on brand Need to make sure all wires are coated - weekly / montly application Needs frequent user intervention Needs frequent user intervention