Ordinary soil acidity meters use glass electrodes that cannot be directly inserted into the soil to test soil acidity, while the pH 400 soil acidity meter uses an in-situ stainless steel probe that can be directly inserted into the soil for testing and reading, which is very convenient.

PH 400 is a newly developed in-situ soil pH meter by Spectrum Corporation. Suitable for scientific research, teaching, agriculture, horticulture, biology, lawns, and other suitable scientific studies.

Functional features:
1. Fashionable, intuitive, and simple user interface;
2. Changes in settings and options will not stop monitoring temperature and pH;
3. A 3.2-inch backlit color LCD screen makes reading settings more convenient;
4. Designed for professionals;
5. IP65- dust and splash proof;
6. Shockproof rubber shell;
7. The USB port has a sealing cover, and the battery compartment has a rubber sealing ring;
8. Intelligent Calibration Wizard;
9. Single point and two-point calibration;
10. Lightweight and compact design;
11. 3 AA rechargeable batteries (including adapter);
Probe - Needle shaped and blunt head ISFET probes
1. Durable glass free probe, no need to store in solution;
2. Using high-quality materials such as PEEK ABS、PVC；
3. Needle shaped probes are suitable for solutions, soilless cultivation media, fluids, soil, and grass;
4. Blunt head is suitable for fluids, soilless cultivation media, and solutions;

Technical parameters:
Acceptable probe: needle shaped, blunt ISFET pH electrode
Range: pH 0.00-14.00； Temperature -5 ° C-120 ° C
resolving power: pH 0.01pH； Temperature 0.1 ° C
Accuracy: pH ± 0.01pH; Temperature ± 0.5 ° C
automatic temperature compensation
Calibration: Single point or 2-point calibration
Can manually store up to ten real-time data
Power supply: 3 AA NIMH 2600mAh rechargeable, replaceable batteries, continuous use for 8 hours,
Size: 80mm x 160mm x 36mm
Weight: 379g
Origin: United States
Probe length: 18cm