On this page
01. Template capacity02. Record capacity03. The queue test04. Where to place them05. Growing06. A typical scenario07. Common mistakes08. Quick checklist09. Frequently asked questions
Capacity differs by variant, so confirm the spec sheet. As a planning rule, count two fingerprints per person against the fingerprint capacity, and add a second terminal if more than about 30 to 50 people must punch within a few minutes.
Key takeaways
- Check capacity of the exact variant.
- Plan 2 fingerprints per person.
- Queues matter as much as capacity.
- Add a second terminal at peaks.
01Template capacity
Capacity is usually quoted in fingerprint templates and users. Divide the fingerprint capacity by two (two fingers each) to see how many staff it supports. Confirm figures for your variant with the seller; do not rely on a web listing.
02Record capacity
Capacity for punches is separate. At four punches a person per day, 100 staff create 400 records a day. Download regularly (memory full).
03The queue test
A fingerprint check takes a second or two when it works. If 60 people arrive within five minutes, queues will form. Rules of thumb:
- Under 30 people: one terminal is fine.
- 30 to 80 with staggered arrival: one is fine, two is comfortable.
- A shift change of many people at once: add terminals at each entrance.
04Where to place them
See where to install.
05Growing
Adding terminals is easy: see multiple devices.
06A typical scenario
A 45-person factory found one terminal caused a queue at 7:55 am. A second terminal at the other entrance halved the wait. Capacity was fine; the queue was the issue.
Illustrative example based on common cases, not a named customer.
07Common mistakes
- Looking only at capacity.
- Ignoring queues.
- One finger per person.
- Never clearing leavers.
- No second terminal plan.
08Quick checklist
- Count staff
- Check capacity
- Estimate peak
- Plan locations
- Plan growth
- Review yearly
09Frequently asked questions
What is the K40 Pro fingerprint capacity?
It varies by variant. Ask the seller for the exact spec.
Can I store more by deleting inactive staff?
Yes, remove leavers.
Is face recognition better for large teams?
Face can be faster for big shift changes. See face attendance prices.
Can I use two terminals for the same staff?
Yes, with the same IDs.
This guide is part of our ZKTeco K40 and ZKBio Time.Net series. For the full start-to-finish walkthrough with screenshots, read How to Configure a ZKTeco K40 Pro with ZKBio Time.Net.
ZKTeco and ZKBio are trademarks of ZKTeco Inc. Menu names on the K40 Pro and in the software vary slightly by firmware and software version; where yours differ, look for the nearest match. Qyvea is a ZKTeco reseller and installer in Kenya.
