In general, biometric readers are usually quite accurate in identity verifications. However, you will need to compare different models as with any electronics to get the best one.
Biometric identifier
Biparietal diameter (BPD) measurements, commonly used in obstetric ultrasound to assess fetal growth and development, are generally considered to be accurate within a range of about ±1 week of gestational age. However, factors such as fetal position, operator skill, and equipment quality can influence measurement precision. While BPD is a useful indicator, it should be interpreted in conjunction with other biometric measurements and clinical assessments for a comprehensive evaluation of fetal health.
Biometric
more accurate, most accurate.
Most are pretty accurate, but get one from the doctor and it will be truly accurate.
Iris scan
Iris scan
Iris scan
Biometric readers other than heart rate monitors may include blood pressure, neural activity, and body temperature. There are many aspects of the human body that can be read and recorded.
It is behavioral biometric. It is used to describe how an individualaddresses the keys on the keyboard. As biometrics go, it has a great price to performance ratio, as it is software only, requiring no special hardware. Purely based on accuracy, it is slightly less accurate than low end fingerprint readers, when comparing crossover error rate.
A biometric scanner is a digital scanner used for imaging biological details. The phrase biometric scanner refers to the various fingerprint readers, palm scanners, retina scanners, and voice scanners used to verify identification.
1) Retina scan 2) Iris scan
Iris recognition is considered one of the most accurate biometric modalities due to its low false acceptance rates and unique pattern that remains stable throughout a person's lifetime. It is difficult to spoof and provides high levels of security.
These are just finger print scanners. they are used for computer or dloor locks.
Biometric devices measure (metric) features of living things (bio). To be useful in security (such as authentication and identification), biometric devices measure features of living things that are unique for any individual, such as the Fingerprint Readers now available on most laptops. Other biometric devices include Voice Print Analyzers, Facial Recognition Scanners, and eye (retina or iris) scanners.
Biometric login can have a few drawbacks. There is an assumption that a person's biometric information cannot be "faked" but biometric experts will tell you that most biometric login methods can be defeated given enough time and resources. Some biometric characteristics change change for a person due to illness or even weather conditions, resulting in an authorized user being denied access. If it is voice - a cold can alter the voice. Injuries to hands can mess up fingerprints, infections can alter iris and retina patterns. Biometric readers can also become damaged and fail to properly authenticate a user. The damage can be so subtle that it cannot be easily detected. As a result of these potential problems it is generally not a good idea to rely exclusively on biometrics for login authentication. It is better to have it as one possible method or as part of a multi-factor authentication.
A biometric time attendance system is a biometric time clock that tracks employee attendance, including when they clock in, when they clock out, and if they showed up when they were scheduled to work. What makes a biometric time clock one of the best time and attendance systems is that it has a biometric fingerprint scanner built in that is much more accurate in time keeping that a time card or time sheets because employees can't clock in other employees. This helps prevent time theft and saves moneyfor the company. Another great feature of biometric attendance systems is that they could also be used as biometric access control for the building's security. Companies can restrict access to certain areas of the building so only certain employees can enter by only approving their fingerprints in the access system. Today, most employers face a challenge in controlling employee's attendance. Some of the major problems are; "buddy‐punching" unauthorized overtime, time spent on processing employees'attendance, and human error in payroll calculation There is a good software called PayPunch Time and Attendance System. www.paypunch.com This is what said on their website. PayPunch is a Time & Attendance tracking system that works in conjunction with biometric time clock: Fingerprint Readers and Hand Readers, as well as, non‐biometric devices: Proximity and HID Card Readers. Instead of employees punching in a time‐card or logging their attendance by hand, they simply place their finger on the Fingerprint Reader sensor, place their hand into the Hand Reader or flash a card in front of the proximity or HID card reader and PayPunch does the rest!