Know Exactly What Is In Your Water
Lab-grade pH, TDS, and EC readings in seconds. Perfect for drinking water, aquariums & hydroponics.
Happy Customers
Average Rating
Satisfaction Rate
Made in Britain
Free UK Delivery
Next-day dispatch from our UK warehouse
2-Year UK Warranty
Full manufacturer warranty with UK support
30-Day Free Returns
No questions asked, prepaid return label
High-Precision Titanium Probe
Delivers ±0.01 pH accuracy in under 3 seconds
What Our Customers Say
I use this daily for my indoor hydroponics setup. The pH accuracy is spot on compared to my old, much more expensive lab meter, and the backlit screen makes it so easy to read inside the grow tent.
Sarah Mitchell, London
Brilliant bit of kit. Delivery was incredibly fast. I bought it primarily for my tropical aquarium to keep an eye on the TDS and temperature. It takes all the guesswork out of water changes.
James Henderson, Manchester
As an environmental consultant, I appreciate the build quality of the titanium probe. It stabilises very quickly and the automatic temperature compensation works flawlessly. Highly recommended for field checks.
Dr. Emily Clarke, Edinburgh
Very accurate once set up. The initial 3-point calibration takes a couple of minutes and requires distilled water which isn't included, but once that's done, it performs exceptionally well.
Oliver Wright, Bristol
I bought a cheap generic tester from Amazon before this and it broke in a week. The SwiftLab Pro-7 feels much sturdier, and the 7-in-1 functionality means I don't need multiple pens cluttering my drawer.
Rebecca Thompson, Leeds
Great tool for my home brewing. The salinity and pH readings are vital for my mash. Only dropping a star because the battery compartment cap is quite stiff to unscrew the first time.
David Patel, Birmingham
SwiftLab
A professional-grade, 7-in-1 smart testing pen that delivers instant, lab-accurate measurements for pH, TDS, EC, and more. Essential for drinking water safety, aquariums, and home brewing.
Professional Precision in Your Pocket
The SwiftLab Pro-7 Digital Water Quality Tester is engineered to bring laboratory-grade environmental diagnostics directly into your home. Equipped with an advanced titanium alloy probe and a highly sensitive glass electrode, the Pro-7 provides instant, reliable readings across seven critical water quality metrics: pH, Total Dissolved Solids (TDS), Electrical Conductivity (EC), Oxidation-Reduction Potential (ORP), Salinity, Specific Gravity (S.G), and Temperature.
Intelligent Automatic Temperature Compensation
Temperature fluctuations can drastically alter water quality readings. The Pro-7 features built-in Automatic Temperature Compensation (ATC) ranging from 0.1°C to 60.0°C. This ensures that your measurements are automatically adjusted for temperature variances, providing you with consistent and highly accurate data regardless of the testing environment.
Built for Everyday UK Life
Whether you are maintaining a delicate marine aquarium, optimising nutrient solutions for hydroponics, or simply testing the hardness of your tap water, the Pro-7 is designed for effortless operation. It boasts an IP67 waterproof rating, meaning it can withstand accidental submersion, while the high-contrast backlit LCD ensures your readings are clearly visible even in poorly lit spaces like under-sink cupboards or dimly lit sheds.
How to Use
- Remove the protective cap from the bottom of the tester.
- Press the power button to turn on the device.
- Immerse the electrode into the water sample up to the maximum immersion line.
- Stir gently and wait for 3-5 seconds until the reading on the LCD screen stabilises.
- Press the 'MODE' button to cycle through pH, TDS, EC, and other metrics.
- After use, rinse the electrode with distilled water, dab dry with a tissue, and replace the protective cap.
Trusted by Over 50,000 UK Households
Frequently Asked Questions
Born out of a Cambridge technology hub in 2019, SwiftLab was created with a singular mission: to democratise precision environmental testing for the UK public. We noticed that reliable water, air, and soil testing equipment was often prohibitively expensive, overly complex, or restricted to professional laboratories. We set out to bridge that gap.
Our team of engineers and environmental scientists spent two years developing our proprietary sensor technology, ensuring it meets rigorous UK calibration standards while remaining intuitive for everyday use. Whether you are a home brewer, an aquarium enthusiast, or simply a parent wanting to ensure the purity of your family's drinking water, our instruments are designed to give you absolute confidence in seconds.
Today, SwiftLab operates from our dedicated facility in the heart of England, proudly supporting over 50,000 British households. We stand by the quality of our instruments with comprehensive UK-based customer support and an unwavering commitment to scientific accuracy. At SwiftLab, we don't just measure metrics; we deliver peace of mind.
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