Unscrew the brake fluid reservoir and pull off the cap of the brake fluid tester then dip the test probes into the brake fluid until up to the plastic rim of the device. 1 Brake Fluid Tester(Battery Not Included).
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Pen-type Portable Leeb Hardness tester Digital Metal hardness tester for Stainless Steel Range HRC HRB HL HB HV HS durometer
Aliexpress UK
Tyre Pressure Gauge UK: In addition to brake fluid testing, this tool can also be used as a tyre pressure gauge. Digital Tyre Pressure Gauge: Equipped with a blue LCD screen and a lighted nozzle, this digital tyre pressure gauge can be used in dimly lit areas for maximum convenience.
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8-In-1 Tester Voltage AC DC 6-500V Auto Electrical Pen Circuit Detector Tester For Home Wiring Inspection Electrical Appliances
Aliexpress UK
Function Switch Key: After starting, press S key to switch to DOT3/DOT4/DOT5.1, and press S button to switch the brake oil type(default is DOT3). Energy saving and low power consumption. The back is designed with a portable pen clip for easy carrying.
eBay
8 -In 1 Voltage Tester For Home Appliances/wiring Inspection AC DC 6-500V Auto Electrical Pen Circuit Detector Tester
Aliexpress UK
Easy Operation: Install the 1 AAA 1.5V battery(no included), press the button at the top, dip the probe into the brake fluid, and the test result will be indicated by LEDs in a few seconds. The brake fluid tester pen will automatically power off after about 15 seconds of inactivity.
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Multimeter Voltmeter Cable Ultra Fine Needle Tester Digital Multi Meter Head Wire Pen Silicone Tester Kit Power Tools Accessory
Aliexpress UK
Neilsen Car Brake Fluid Tester Indicator Pen Tool Battery included Test Brake Fluid Tester AAA Battery included.
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NJTY T02A Multifunction Non-Contact High Voltage Induction Tester, Live/Neutral Wire Detector, Household Electric Tester Pen
Aliexpress UK
Brake Fluid Tester Pen Auto Brake Oil Liquid Tester BF200 For DOT3/T4/T5.1. Blue Driver Universal High Precision Car Brake Fluid Tester for DOT3/DOT4/DOT5.1 Accurate Brake Oil Quality Check. Why Does Brake Fluid Tester is Essential Tool?.
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NJTY T02A Multifunction Non-Contact High Voltage Induction Tester, Live/Neutral Wire Detector, Household Electric Tester Pen
Aliexpress UK
5 Set Cabinet Hardware Wooden Cupboard Pulls Handle Modern Kitchen Handles Knob. Ignition Tester Ignition Coil Test Auto Spark Tester Ignition Spark Tester. Brake Fluid LED Tester Detector (Black) Brake fluid tester.
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Smart Induction Tester Pen AC 12-300V Voltage Tester NCV Sensor Wire Detector 50/60Hz Professional Electrician Tool Screwdriver
Aliexpress UK
1x Brake Fluid Tester (1.5V AAA battery not included). 0% LED: Water content in brake fluid. 1% LED: water content, H2O ≤ 1%, brake fluid above. 3% LED: water content, H2O ≤ 3%, brake fluid. 4% LED: water content, H2O≥ 4%, brake fluid must be.
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Pen Type Digital Multimeter ANENG A3005 Professional AC Voltage Current Tester Inductive 4000 Counts Resistance Tester Tools
Aliexpress UK