The price of a sensor is the least of it
Ask what a Time of Flight sensor costs and you will get three legitimate answers spanning three orders of magnitude, because "ToF sensor" names everything from a bare ranging module soldered into phones to a certified, networked people-counting system installed above a shop door. This post does not quote prices, which move constantly and depend on volume; it explains the structure of the cost, so a quote in front of you makes sense.
Why do ToF sensor prices vary so much?
Because the word covers three different products. Bare single-zone ranging modules are commodity components produced in enormous volume for consumer electronics. Depth-camera modules with resolution, calibrated optics, and processing cost meaningfully more. Finished counting devices (enclosure, certification, mounting, firmware, network stack, management software) price as systems, not components, and the sensor chip inside is a minor line item in that build.
What drives the hardware cost
- Measurement class. Single-zone ranging is cheapest; dense depth arrays cost more; long-range or outdoor-capable designs (higher-power emitters, SPAD detectors) more again. The architecture split is covered in dToF vs iToF.
- Optics and calibration. A depth camera is only as good as its factory calibration, and calibrated optics are labor and test time.
- Enclosure and certification. IP-rated housings, safety certification for the infrared emitter, radio certification if wireless, regional compliance marks. Boring, mandatory, and a real share of the unit cost.
- On-board compute. A device that processes depth frames locally and ships only counts carries its own processor; one that streams raw data pushes that cost into your network and servers instead.
The system costs that dwarf the sensor
For a counting deployment, the ledger that matters is the five-year system ledger, and hardware is rarely its biggest line:
- Installation and cabling. A PoE run to a ceiling position can cost more than the device it powers. The PoE vs battery trade-off is where this shows up first.
- Coverage math. Wide entrances need multiple units per door; door count times unit-plus-install is the real hardware line.
- Software and subscription. Counts need a platform: storage, dashboards, APIs, user management. Priced per sensor, per site, or per year, this line usually overtakes hardware within the first years.
- Maintenance and recalibration. Small per unit, real across an estate.
The full worked model lives in the total cost of ownership breakdown, and the way to force competing quotes into comparability is the RFP question set.
How to read a cheap quote
A counting quote that undercuts the field usually did one of three things: counted fewer devices than your doors need, moved cost into a subscription line on page four, or quoted a sensor without the system. None of these is fraud; all of them are why quotes get compared on the five-year total, per covered door, at verified accuracy. Verified is the load-bearing word, and the accuracy test methodology is how you make it mean something.
For what the sensor itself does for the money, the pillar explainer is Time of Flight sensors, explained.
# Program 3, Cluster 1 (Time-of-Flight) EN drafts: Part C (rows 209-212)
Status: EN drafts for review. Not pushed to CMS. No images, no DE yet.
Author: Govarthan.
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