Introduction
Product Definition
The A70a is a water testing pen used to measure TDS (Total Dissolved Solids) and EC (electrical conductivity) in water, and is currently one of the most widely used water quality testing pens on the market. The values it measures represent the total content of dissolved solids in water and the water's ability to conduct electric current. It uses a high-performance chip combined with a titanium alloy probe to ensure the accuracy and stability of the measured values.
Product Overview
- Built-in 600 mAh high-capacity rechargeable lithium battery; a single charge lasts up to six months;
- High-definition backlit segment LCD display with clear readings, even in the dark;
- Probe made of high-performance titanium alloy for stable and accurate readings with a wider detection range;
- Universal Type-C charging port, compatible with most Android phone charging cables on the market.
Core Functions
- TDS Measurement: Range 0-9990 ppm (10.1-100.0 ppt), resolution 1 ppm/0.1 ppt, accuracy ±2% F.S.
- Conductivity Measurement: Range 0-9990 μS/cm (10.1-200.0 mS/cm), resolution 1 μS/cm/0.1 mS/cm, accuracy ±2% F.S.
- Temperature Measurement: Range 0-60°C (32.1-140.0°F), used for temperature compensation and reference alongside other water quality parameters.
Use Cases
- Quick water quality testing for household drinking water and reverse osmosis system output
- Water quality monitoring and maintenance for fish tanks and aquariums
- Water management in aquaculture
- Nutrient solution concentration testing for hydroponic plants
- Testing of swimming pools, hot springs, and general water environments
FAQ
Q: What are the benefits of using a titanium alloy probe in this water testing pen?
A: Titanium alloy is a highly chemically inert material that does not readily react with residual chlorine or trace ions in water, reducing electrode polarization. It responds quickly during measurement and is less prone to continuous drift errors. It is also a low-magnetic material, which reduces reading drift caused by magnetic fields in practical use, making EC/TDS readings more stable, more repeatable, and less subject to value fluctuation. In addition, its hardness and corrosion resistance are significant advantages. This is why titanium alloy is widely used in high-end instruments and meters today.
Q: Does this water testing pen have a hold function?
A: Yes, this product has a hold function. Press the hold button once to lock the current reading on the display; press it again to unlock.
Q: Does this testing pen require calibration?
A: This testing pen is calibrated at the factory before shipment, so it can be used immediately upon receipt. The pen uses a titanium alloy probe, whose electrode surface properties are not prone to change — it does not corrode or suffer coating detachment over a short period, and the electrode constant remains stable long-term. In addition, TDS and EC measurement principles are physical measurements, unlike pH electrodes which rely on chemical reactions; they do not experience rapid failure issues such as glass membrane aging or liquid junction blockage. Therefore, this testing pen does not require frequent calibration.
Q: How long does it usually take to fully charge the product?
A: This product is charged via a standard Type-C charger and takes approximately 2.5-3 hours to reach a full charge.
Q: What is the purpose of temperature measurement?
A: Measurement values are significantly affected by temperature fluctuation, especially electrical conductivity. The integrated temperature sensor provides the basis for temperature compensation in the program, which counteracts the impact of temperature changes on the measured values.
Related Terms
- TDS: Total Dissolved Solids, indicating the total amount of dissolved solids in water, commonly expressed in ppm or ppt.
- Electrical Conductivity: Indicates the ability of water to conduct electric current, commonly expressed in μS/cm or mS/cm, reflecting the concentration of ions in water.