Brake Fluid Tester DOT3 DOT4 DOT5 Test Device with LED Display
Brake Fluid Tester DOT3 DOT4 DOT5 Test Device with LED Display is backordered and will ship as soon as it is back in stock.
Covers the common brake fluids
Five-level LED display from green to red
Eine AAA-Batterie, automatische Abschaltung
Detects the water content before the boiling point drops
Brake Fluid Tester DOT3 DOT4 DOT5 Test Device with LED Display
Description
Description
Brake fluid detection device | Brake oil quality check
The brake fluid tester allows you to easily and reliably check the quality of your brake fluid . This handy device measures the moisture content of the brake fluid and displays the result via a 5-LED indicator . It is perfectly suited for testing DOT3, DOT4, and DOT5 brake fluids.
Product features of the brake fluid detection device
- Condition: 100% New
- Brake fluid quality check: Indicates the moisture content
- 5 LED lights: Indicates the moisture levels of the brake fluid
- Automatic shut-off: Energy-saving, switches off automatically after use.
- Battery: Requires 1 LR03 AAA battery (not included)
How it works
The brake fluid detection device uses changes in conductivity to measure the moisture content of the brake fluid. The moisture level is indicated by colored LED lights.
- Green LED: Brake fluid in good condition, water content <1.5%
- Yellow LED: Water content between 1.5% and 3%, check recommended in six months
- Red LED: Water content >3%, immediate brake fluid change required.
- Red LED flashing: Battery low, battery replacement necessary
Technical specifications
| Testable brake fluids | DOT3, DOT4, DOT5 |
|---|---|
| power supply | 1 LR03 AAA battery (not included) |
| Humidity indicator | 5 LEDs (Green, Yellow, Red) |
| Automatic shutdown | Yes |
Instructions for use
- Turn on the device by pressing the switch. The green LED indicates that the battery is in good condition.
- Immerse the tip of the device in the brake fluid.
- The LED indicators light up and show the current moisture content of the brake fluid.
- Replace the brake fluid as needed, according to the LED indicators.
Buy the brake fluid detection device now
Order the brake fluid level tester today and ensure maximum safety and performance for your vehicle. Ideal for workshops , hobby mechanics , and professional technicians.
Attention EU buyers: We issue net invoices when you provide your VAT ID number. Do you have any questions? Please feel free to call us on +49 711 36544645.
Technical background to brake fluid testing
Why moisture in brake fluid is critical
Brake fluid is hygroscopic, meaning it attracts moisture from the surrounding air over time. Even small amounts of water significantly lower its boiling point. Under high thermal stress, such as during long downhill drives or with heavy vehicle loads, vapor bubbles can form. These vapor bubbles are compressible and lead to increased pedal travel or, in extreme cases, partial brake failure. Regular checks with a suitable testing device significantly reduce this risk.
Measurement principle via electrical conductivity
The brake fluid detection device uses changes in electrical conductivity to determine the water content. Pure brake fluid has a different conductivity than fluid mixed with water. The resistance is measured via two electrodes and evaluated electronically. The integrated circuit assigns the measured value to a predefined threshold and activates the corresponding LED stage.
Differentiation from professional boiling point testers
Some workshops also use boiling point measuring devices that actively heat the brake fluid. These methods are very accurate, but more complex and expensive. The device described here represents a practical, fast, and sufficiently accurate alternative for routine checks. Conductivity measurement is particularly cost-effective during service intervals or pre-purchase inspections.
Areas of application in workshop and practice
Rapid diagnosis during the service acceptance process
A quick brake fluid check can be performed as soon as the vehicle is received. Within seconds, the service advisor receives a reliable assessment of the fluid's condition. This facilitates transparent customer consultation and makes it easier to justify the need for a brake fluid change.
Integration into maintenance plans
Many manufacturers specify a brake fluid change every two years. However, the actual condition of the fluid can vary. A brake fluid analysis device enables a condition-based assessment and supplements rigid maintenance intervals with a technical measurement basis.
Use in used car inspections
In the used car market, the assessment of safety-relevant components is crucial. Besides brake pads and discs, the brake fluid should also be inspected. Elevated water content can indicate outstanding maintenance and can be factored into price negotiations.
Application in the private sector
Ambitious DIY mechanics also benefit from a quick condition check. Regular inspections before putting older vehicles or cars used seasonally are particularly recommended.
Software and hardware aspects
Electronic evaluation unit
Inside the device is a compact evaluation electronics unit that processes the measured resistance. The calibration is factory-defined and optimized for typical DOT3, DOT4, and DOT5 brake fluids. This eliminates the need for manual adjustment by the user.
Robust sensor design
The measuring tip is designed to withstand brief immersion in brake fluid without causing corrosion or material damage. Nevertheless, the device should be cleaned with a suitable cloth after use to remove residue and ensure long-term measurement accuracy.
Power supply and automatic shutdown
The automatic shut-off significantly reduces energy consumption. Especially in everyday workshop use, where devices are frequently in operation, this function prevents unnecessary battery discharge and increases availability.
Safety-relevant assessment and purchase recommendation
The brake fluid tester offers a practical and economical solution for quickly assessing the condition of brake fluid. The clear LED display allows for immediate interpretation without the need for additional evaluation tools. For workshops, it provides an efficient addition to the regular service process, while for private users it offers a simple way to perform independent safety checks.
Given the critical importance of the braking system for safety, brake fluid should not be neglected. A compact, ready-to-use measuring device allows for an objective assessment of the fluid's condition and enables timely replacement. This not only increases driving safety but also protects components such as ABS hydraulic units and brake calipers from corrosion-related damage.
Shipping and payment terms
Shipping and payment terms
FREE SHIPPING WITHIN THE EU ON ORDERS OVER €100!!
Goods are regularly delivered by shipping to the delivery address provided by the customer. The delivery address provided by the customer during the ordering process is decisive for the transaction. Deviating from this, if PayPal is selected as the payment method, the delivery address stored by the customer with PayPal at the time of payment is decisive.
If delivery to the customer was not possible and the shipping company returns the shipped goods to the seller, the customer bears the costs for the unsuccessful shipment. This does not apply if the customer exercises their right of withdrawal by refusing acceptance, if they are not responsible for the circumstance that led to the impossibility of delivery, or if they were temporarily prevented from accepting, unless the seller announced the service to them a reasonable time in advance.
You can choose to pay by bank transfer (prepayment), PayPal (direct debit and credit card via PayPal), Klarna (purchase on account or installment payment), Shop Pay, Google Pay or cash on delivery. If cash on delivery is selected as the payment method, an additional fee of €9.99 will be charged.
Free shipping within Germany for orders over €50.
Shipping costs within the EU are €14.99. For orders over €100, shipping within the entire EU is free.
The delivery time within Germany is usually 1–3 business days.
Worldwide shipping – to countries outside the EU – is also available. The applicable shipping costs are calculated and displayed during checkout depending on the destination country. For deliveries to countries outside the EU, additional customs duties, import taxes or other charges may apply, which are to be borne by the customer.
Questions about this product? Send us a message.
Frequently asked questions
At what water content should the brake fluid be changed?
At what water content should the brake fluid be changed?
The LED display assigns the reading directly to a level: green means less than 1.5% water content and the brake fluid is in good condition. Yellow stands for 1.5 to 3% and therefore a recommended check. With red the content is above 3% and a change is advisable.
Which brake fluids is the tester suitable for?
Which brake fluids is the tester suitable for?
The tester supports DOT3, DOT4 and DOT5. Which type is used in your vehicle is usually stated on the cap of the reservoir or in the manual. Check this before use, as the measurement depends on the brake fluid.
How does the measurement work?
How does the measurement work?
The device measures the electrical conductivity of the fluid. As the water content rises, this value changes, and the device assigns it to a fixed warning level. The measurement takes only a few seconds and is carried out directly at the reservoir.
Does the tester replace an inspection of the brake system?
Does the tester replace an inspection of the brake system?
No. The device only checks the moisture content of the brake fluid. It does not replace a full technical inspection of the brake system by qualified personnel. It is a testing device for condition checks, not a diagnostic device and not a vehicle scanner.
What does a flashing red LED mean?
What does a flashing red LED mean?
A flashing red LED indicates a low battery level of the tester, not the condition of the brake fluid. In that case, replace the AAA battery before continuing to measure.
Brake Fluid Tester DOT3 DOT4 DOT5 Test Device with LED Display
Brake fluid detection device | Brake oil quality check
The brake fluid tester allows you to easily and reliably check the quality of your brake fluid . This handy device measures the moisture content of the brake fluid and displays the result via a 5-LED indicator . It is perfectly suited for testing DOT3, DOT4, and DOT5 brake fluids.
Product features of the brake fluid detection device
- Condition: 100% New
- Brake fluid quality check: Indicates the moisture content
- 5 LED lights: Indicates the moisture levels of the brake fluid
- Automatic shut-off: Energy-saving, switches off automatically after use.
- Battery: Requires 1 LR03 AAA battery (not included)
How it works
The brake fluid detection device uses changes in conductivity to measure the moisture content of the brake fluid. The moisture level is indicated by colored LED lights.
- Green LED: Brake fluid in good condition, water content <1.5%
- Yellow LED: Water content between 1.5% and 3%, check recommended in six months
- Red LED: Water content >3%, immediate brake fluid change required.
- Red LED flashing: Battery low, battery replacement necessary
Technical specifications
| Testable brake fluids | DOT3, DOT4, DOT5 |
|---|---|
| power supply | 1 LR03 AAA battery (not included) |
| Humidity indicator | 5 LEDs (Green, Yellow, Red) |
| Automatic shutdown | Yes |
Instructions for use
- Turn on the device by pressing the switch. The green LED indicates that the battery is in good condition.
- Immerse the tip of the device in the brake fluid.
- The LED indicators light up and show the current moisture content of the brake fluid.
- Replace the brake fluid as needed, according to the LED indicators.
Buy the brake fluid detection device now
Order the brake fluid level tester today and ensure maximum safety and performance for your vehicle. Ideal for workshops , hobby mechanics , and professional technicians.
Attention EU buyers: We issue net invoices when you provide your VAT ID number. Do you have any questions? Please feel free to call us on +49 711 36544645.
Technical background to brake fluid testing
Why moisture in brake fluid is critical
Brake fluid is hygroscopic, meaning it attracts moisture from the surrounding air over time. Even small amounts of water significantly lower its boiling point. Under high thermal stress, such as during long downhill drives or with heavy vehicle loads, vapor bubbles can form. These vapor bubbles are compressible and lead to increased pedal travel or, in extreme cases, partial brake failure. Regular checks with a suitable testing device significantly reduce this risk.
Measurement principle via electrical conductivity
The brake fluid detection device uses changes in electrical conductivity to determine the water content. Pure brake fluid has a different conductivity than fluid mixed with water. The resistance is measured via two electrodes and evaluated electronically. The integrated circuit assigns the measured value to a predefined threshold and activates the corresponding LED stage.
Differentiation from professional boiling point testers
Some workshops also use boiling point measuring devices that actively heat the brake fluid. These methods are very accurate, but more complex and expensive. The device described here represents a practical, fast, and sufficiently accurate alternative for routine checks. Conductivity measurement is particularly cost-effective during service intervals or pre-purchase inspections.
Areas of application in workshop and practice
Rapid diagnosis during the service acceptance process
A quick brake fluid check can be performed as soon as the vehicle is received. Within seconds, the service advisor receives a reliable assessment of the fluid's condition. This facilitates transparent customer consultation and makes it easier to justify the need for a brake fluid change.
Integration into maintenance plans
Many manufacturers specify a brake fluid change every two years. However, the actual condition of the fluid can vary. A brake fluid analysis device enables a condition-based assessment and supplements rigid maintenance intervals with a technical measurement basis.
Use in used car inspections
In the used car market, the assessment of safety-relevant components is crucial. Besides brake pads and discs, the brake fluid should also be inspected. Elevated water content can indicate outstanding maintenance and can be factored into price negotiations.
Application in the private sector
Ambitious DIY mechanics also benefit from a quick condition check. Regular inspections before putting older vehicles or cars used seasonally are particularly recommended.
Software and hardware aspects
Electronic evaluation unit
Inside the device is a compact evaluation electronics unit that processes the measured resistance. The calibration is factory-defined and optimized for typical DOT3, DOT4, and DOT5 brake fluids. This eliminates the need for manual adjustment by the user.
Robust sensor design
The measuring tip is designed to withstand brief immersion in brake fluid without causing corrosion or material damage. Nevertheless, the device should be cleaned with a suitable cloth after use to remove residue and ensure long-term measurement accuracy.
Power supply and automatic shutdown
The automatic shut-off significantly reduces energy consumption. Especially in everyday workshop use, where devices are frequently in operation, this function prevents unnecessary battery discharge and increases availability.
Safety-relevant assessment and purchase recommendation
The brake fluid tester offers a practical and economical solution for quickly assessing the condition of brake fluid. The clear LED display allows for immediate interpretation without the need for additional evaluation tools. For workshops, it provides an efficient addition to the regular service process, while for private users it offers a simple way to perform independent safety checks.
Given the critical importance of the braking system for safety, brake fluid should not be neglected. A compact, ready-to-use measuring device allows for an objective assessment of the fluid's condition and enables timely replacement. This not only increases driving safety but also protects components such as ABS hydraulic units and brake calipers from corrosion-related damage.