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一把锁至少带指纹开门跟机械开门，机械钥匙开门是国家法律规定的。如果又附加了密码，感应卡之类的开门方式，价格自然就高了。市场上指纹锁价格不一，有高有低，普通型的指纹锁1500至4000元之间，别墅型的更高些。总得来，需要消费者根据自己的需求与购买力，综合比较产品的性价比。总的原则是一分钱一分货。

指纹锁选购指南

（一）看材质

指纹锁的制作材料主要三种，分别是塑料、锌合金、不锈钢。其中，塑料的耐用性、防火、防爆性能最差，锌合金次之，不锈钢最佳。由于国内治安环境复杂，因此国内指纹锁一般以锌合金为主，以及少量的不锈钢指纹锁。针对国情来说，国内消费者在选择指纹锁时最好选择不锈钢指纹锁，且需记住”一看二敲三掂量“的选购字诀。

一看：看外表。三种材质的指纹锁在外表看来几乎没有多大的差别，这得益于现代高超的电镀技术，将不同的材质电镀得外观几乎和金属相似。塑料材质的指纹锁一般表面较为光滑，色泽艳丽，而锌合金稍微粗糙和亚色一点，不锈钢最为粗糙和亚色。

二敲：如果很难“看“出指纹锁材质，我们可以用“敲“加以判断。用手指轻轻敲锁体的侧边(正面由于触摸屏等不同材质的构件不好判断)，如果声音浑浊不清或较为空旷，那么一般来说是塑料制品的可能性较大，不锈钢指纹锁敲击起来声音比较尖锐集中，没有太大的扩散感，穿透力比较好，而锌合金鉴于两者之间，声音没有不锈钢尖锐，但比塑料制品清新明朗许多。

三掂量：如果用“看“与”敲“两个方式均还不能判断出指纹锁材质的好坏，那么可以用一个最简单也是最有用的方法去衡量，那就是“掂量“，大家都知道这三种材料孰轻孰重，塑料制锁即使内部分量很足(一般塑料锁内部零部件材质也是塑料或者其劣质材料)与锌合金或者不锈钢还是会存在一定的差别，掂一掂就知分晓了。

（二）试功能

这里所说的“试功能“指的是“三开两度”，“三开”是指指纹开锁、密码开锁及磁卡开锁，“两度”是指反应速度及精准度，即测试这三种开门方式的速度及精准度。

首先，测试指纹开锁的反应速度及精准度。先让店员录入你的指纹，这也是检验指纹锁功能的一步。录指纹时，观察一下店员录入指纹的难易度，如果一个指纹录入多次都不能识别，几乎可以判断此指纹锁的分辨率不高(分辨率越高，辨识越精准，反应越快，安全性也越好。目前指纹锁分辨率的行业标准是500dpi，现能达到的最高标准是第吉尔指纹锁的560dpi)。录入指纹后，随机测试指纹锁对正确指纹的辨识及反应速度，如果指点即开，那么它的反应速度就快，反之则慢。反应速度越快说明分辨率越高，锁的性能越好。同理，如果能快速识别真假指纹，那么其精准度就好，反之则差。测试时最好多试几次，只有多测试几次才能更好的辨认其优劣。

其次，测试磁卡和密码开锁。磁卡开锁和指纹开锁的测试方式一样，也是测试其反应速度及精准度，分别用授权的磁卡和没有授权的磁卡在磁卡区域分别测试，看锁对磁卡的反应及辨认，如果反应速度快，那么锁的性能就好，反之则差。密码开门也是测反应速度及精准度，测试方式也是用正确的与不正确的两种方法交替进行，反应速度越快说明技术含量越高，而精准度越高，安全性就会越高。

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Firstly, test the reaction speed and accuracy of fingerprint unlocking. First, let the salesperson enter your fingerprint, which is also a step to verify the fingerprint lock function. When recording fingerprints, observe the difficulty of the salesperson entering fingerprints. If a fingerprint cannot be recognized multiple times, it is almost certain that the resolution of the fingerprint lock is not high (the higher the resolution, the more accurate the identification, the faster the response, and the better the security). Currently, the industry standard for fingerprint lock resolution is 500dpi, and the highest standard that can be achieved is 560dpi of the Digier fingerprint lock. After entering the fingerprint, randomly test the fingerprint lock's recognition and response speed to the correct fingerprint. If it is opened immediately with a finger, its response speed will be faster, otherwise it will be slower. The faster the response speed, the higher the resolution and the better the lock performance. Similarly, if true and false fingerprints can be quickly identified, then their accuracy is good, and vice versa. It is best to try multiple times during testing, as only by doing so can one better identify its strengths and weaknesses.

Secondly, test the magnetic card and password to unlock. The testing method for magnetic card unlocking and fingerprint unlocking is the same, which also tests their reaction speed and accuracy. Authorized and unauthorized magnetic cards are tested separately in the magnetic card area to observe the lock's reaction and recognition of the magnetic card. If the reaction speed is fast, the performance of the lock is good, and vice versa. Password opening is also a test of reaction speed and accuracy, and the testing method is also alternating between correct and incorrect methods. The faster the reaction speed, the higher the technical content, and the higher the accuracy, the higher the security.

（3） Look at the plug

When buying a fingerprint lock, besides looking at the lock body, the insert is also a very important part, which is often overlooked by consumers. There are three ways to look at the plug: first, look at the material of the plug, second, look at the locking point of the plug, and third, look at the function of the plug.

At first glance, the material of the plug is divided into three types, namely plastic, alloy, and stainless steel, just like the shell. Generally, the plug is not electroplated and can be easily identified by consumers. Due to the placement of the plug inside the door, many enterprises are relatively casual about the material of the plug. In the industry, stainless steel is generally used inside the plug, but the outer shell of the plug is made of alloy or plastic. This type of plug not only has weak resistance to violence, but also weak fire resistance, which is not conducive to safety. The Digier fingerprint lock is the only product in the industry with all inserts made of stainless steel, and its firmness and fire resistance are dozens of times higher than ordinary materials.

Second, check the locking point: In addition to checking the material, attention should also be paid to the locking point of the plug. The locking points of fingerprint lock inserts are mainly divided into two types: single tongue and multiple locking points. The safety of a single tongue lock core is inferior to that of a multi lock point lock, and its anti prying and explosion-proof performance is also poor. It is generally used more in developed countries abroad and regions such as Japan and South Korea, and is not suitable for the complex security environment in China. Therefore, it is recommended that domestic consumers have a clear view of the insert when choosing a fingerprint lock, and choose a multi lock point insert with explosion-proof and anti prying performance.

Three functions: Currently, the plug-in cores on the market are generally divided into hotel lock plug-in cores, upward lifting plug-in cores, large tongue automatic pop-up plug-in cores, and multi lock point self popping plug-in cores. The hotel lock core can be pried open with a card, which has poor safety performance; When using the pull-up plug, it is necessary to lift the handle up to lock the door when closing it, which can easily cause people to forget to lock and does not conform to consumer usage habits;

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