Tourmaline is mostly related to gas, generally occurring in granite pegmatite and metamorphic rocks formed by metasomatism. Piezoelectric crystals can be used in radio industry, and bright colors can be used as gems, which are called tourmaline in China. Tourmaline can not only release negative oxygen ions, but also release 0.06 mA weak current and far infrared rays.
The main methods to identify the quality of negative ion generator are:
1. Check the electromagnetic shielding performance of the generator, which should not affect the normal use of nearby radios and televisions.
2. According to the principle that the work done by gravity between positive and negative electrodes can be converted into electric energy, the negative ion generator was placed in the center of a spacious house and began to work. The tester holds one end of the new 8-watt fluorescent tube in one hand, and rubs the tube back and forth with dry silk in the other hand for enzyme bath, and then puts the other end of the tube near the outlet of the generator.
3. Put a new plastic film food bag on your hand. When your hand is close to the outlet of the generator with good performance, negative ions will be sprayed on the food bag to generate electrostatic attraction, and the plastic bag will be tightly attached to your hand. Even if the negative ion generator is turned off, the accumulated charge will not disappear immediately, and the hand-sucking phenomenon will remain for some time; There is no such phenomenon in products with poor performance.
4. Generally, the negative ion generator has only one metal spray needle, and this product is more suitable for a room of 20 square meters. If you put it in a room of more than 20 square meters, you can choose a generator with two metal spray needles.