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ZKTOOL Brake Fluid Tester Pen, Brake Fluid Liquid Tester Pen
✅ In stock
⭐ Lowest price we've tracked
F
Grade
Analysis Confidence
73%
⚠️ Price may have changed. Last updated 24+ hours ago — confirm on Amazon.
Check Deal at Amazon
Price verified Jul 18, 2026 8:09 PM · Prices & availability subject to change
Is This a Good Price on Amazon?
💤 Not a Deal- 💤Verdict: Not a Deal. Price is at or above historical norms. Best to wait for a sale.
- 💰The current price sits right around what this item typically fetches.
- 🏷️The retail sticker price has been slashed by 95% — a steep markdown from the official listing.
- 📉Our analysis places this at the most competitive price point we have ever tracked for this product — an exceptional moment to buy.
- ➡️Pricing has held fairly steady, with no strong push in either direction.
How We Scored This Deal
Price Competitiveness
0/28
Recent Value
0/22
Market Standing
0/20
Deal Strength
20/20
Momentum
4/10
📝 Product Overview
🏪 Sold by
ZKTOOL
📦 Fulfillment
Fulfilled by Amazon
🚚 Shipping
Free Shipping
Product Details
✓Function: The new pen type brake fluid moisture tester can widely test the percentage of moisture in DOT3 DOT4 DOT5.1 ENV6 ENV4 brake fluid; the results appear within a few seconds, fast and simple. Compared with similar products, it has a faster, more accurate reading capability and a wider range. Tap the top to turn on, and the green light is inserted into the water to use, simple and fast.
✓LED lights: 5 LED lights indicate the percentage of water in the brake fluid in three colors of green, yellow, and red. From low to high, they are green (0%), green-yellow (<1%), green-yellow-yellow (1 %-2%), green yellow yellow red (2%-4%), green yellow yellow red red (>4%). Easily grasp the percentage of water in the brake fluid, and consider whether to replace the brake fluid.
✓Convenience: The brake fluid tester tool is simple and convenient. It only takes a few seconds to check the quality of car brake fluid. It is easy to operate for many new car owners. At the same time, it is a must-have vehicle tool because of its small size and easy portability. And it will automatically shut down if you don't use it within 12 seconds, saving your battery. (Requires 1 x AAA/1.5V battery, not included)
✓Quality: The new Brake Fluid Liquid Tester Pen is a perfect tool that we updated after many studies of similar products on the market. It reads more accurately during the test. At the same time, its shell material is made of high-quality nylon, compared to ABS materials. The product is more corrosion resistant and has a longer service life.
✓Operation: Long press the top button to switch the type of brake fluid, the initial default is DOT3, and each time the LED from low to high turns on three times, one brake fluid is switched. If you want to use one of the brake fluids, when the LED light is in the brake fluid type gear, please release the top button when it flashes twice, and insert the bottom sensor plug into the brake fluid (brake fluid test pen 2/3 ), and you will understand percentage of water in your vehicle’s brake fluid
⚙️ Specifications
Brand
ZKTOOL
Item dimensions L x W x H
0.79 x 2.64 x 1.42 inches
Material
Nylon
Item Weight
0.06 kg
Style
Modern
Maximum Supply Voltage
1.5 volts_of_direct_current
Measurement Accuracy
Better than similar products
Measuring Range
0% to >4%
Mounting Type
Handheld
Output Type
Digital
Response Time
5 seconds