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IEMI Labs
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VisionDesign rev A, 28 Oct 2026: smart full-height site turnstile that runs the gate (8 calls, 5 alone, 3 assist), call lights, tone, voice prompt, ATECC608 and tamper switch inside; 12 camera and radar views checked in the CAD; not built

SiteOne

IEMI's one product for a construction site: the site's own entry turnstile, made smart

The full-height turnstile already standing in the hoarding at the site's pedestrian entrance, at the same 1,400 x 1,400 x 2,400 mm size, baseplate and mains feed, checks hard hat, hi-vis and boots at every entry, keeps the signed list of who is on site and sends the muster list in an evacuation, calls tailgating and after-hours entry, sets the site's heat flag and rest time, and warns of dust, smoke and noise at the boundary.

Who buys it
General and principal contractors, groundworks and civils firms, quarries and mine surface entrances with a controlled pedestrian gate, bought or hired with the turnstile through the site's access-control or plant-hire supplier.
Why it pays
$8,990 + $99/month per entrance instead of about $9,098 + $198/month for a plain turnstile with a sign-in service, PPE Gate AI and HeatGuard AI bought separately (est.).
Target price
$8,990 per entrance (replaces its turnstile) + $99/month gate app with LTE-M (target)
First-minute wow
06:57 on a Monday with nobody on the gate: the turnstile holds one entry until the hard hat goes on, and at 14:02 the fire marshal has the list of the two people still on site before they reach the muster point.
See the CAD designConcept page
SiteOne concept: the idea and where each part goes
The concept. The CAD design is below, under Printable CAD.

What the research found

And how this design answers it

  • Rev A (28 Oct 2026): the construction and mining flagship is the site's own full-height entry turnstile. Canopy: Raspberry Pi 5 brain, Camera Module 3 Wide entry camera (street face, 35 degrees down) and site camera (site face, 20 degrees down), HLK-LD2450 rotor radar in the canopy floor, Sensirion SPS30, SHT45, MAX31865 + PT1000 on the black lid patch, MAX9814, three NeoPixel call lights, piezo, speaker and MAX98357A, ATECC608, Walter LTE-M, IRM-20-5, PowerBoost 1000C and LiPo; D2F-01 tamper switch under the lid; reader head: PN532 tap reader, 2.13 in e-paper and the PPE light
  • Makes the gate's calls itself: PPE at entry, who is on site and the muster list, tailgating, after-hours entry and the heat flag alone; dust, smoke and noise at the boundary go to the site manager; unsure means 'check'
  • Legal at the gate: IBC 1010.3.1 high turnstile (free turn for the exit, 787 mm passage), 80 in headroom and the ADA 100 mm protrusion limit checked in the CAD; the site's own accessible and emergency gate kept beside it
  • Nothing added to the site: no PPE camera mast, no heat station, no dust monitor on the hoarding

Use case

A 60-person building site with one pedestrian gate and no gateman

Site managerSupervisors and crew leadsFire marshalContractor safety lead

  1. 01Trigger: shift start, a missing hard hat, two people in one turn, a hot afternoon, a dusty slab break-out, a fire alarm
  2. 02Detect: entry and site cameras, the rotor radar, the tap reader and heat, dust and sound sensors inside the turnstile
  3. 03Act: the turnstile's own lights, tone and voice prompt; the entry held until PPE is on; the muster list to the fire marshal
  4. 04Log: one signed gate log per site for the site manager, the client, the inspector and the insurer

Outcome: PPE checked at every entry, a right on-site list in every evacuation, heat rest kept, dust found before a complaint, and a signed record

How it works

Architecture

  1. 01

    Sense: entry and site cameras, a rotor radar, a tap reader, heat, dust and sound sensors inside the turnstile

  2. 02

    Decide: PPE, counting, smoke, heat, dust and noise models on the Raspberry Pi 5; 'check' below the line

  3. 03

    Act: the turnstile's own call lights, tone, voice prompt and entry hold

  4. 04

    Tell: one signed log and calls to the gate app over LTE-M

Hardware

Real parts, buyable today

Bill of materials: $5,739 per entrance at qty 1 with the plain turnstile ($5,228, est.) and $511 of our parts; replaces the site's turnstile.

BlockPartWhy this part
BrainRaspberry Pi 5 (2 GB)Runs the PPE, counting and smoke models and every call
See2 x Raspberry Pi Camera Module 3 Wide + HLK-LD2450PPE as people walk up, smoke and the muster point; people in each turn
Site conditionsSensirion SPS30, Adafruit SHT45, MAX31865 + PT1000, MAX9814Dust, heat index with sun load, noise
GatePN532 tap reader, Waveshare 2.13 in e-paper, 4 x NeoPixel Stick 8, piezo, speakerOn-site list, heat flag, PPE prompt, calls
Security, power and uplinkATECC608, Omron D2F-01, Mean Well IRM-20-5, PowerBoost 1000C, LiPo, DPTechnics WalterSigned calls, tamper log, the muster list over LTE-M with the power off

Mechanical

Printable CAD

3 parts, generated from code and checked as closed solids. Pick a part to inspect it, or download the STL files to print.

Loading the CAD…

Real CAD · drag to rotate · scroll to zoomReal CAD · swipe sideways

Open risks we are working on

  • PPE detection in rain, low sun and at night: the gate holds only on a confident miss, otherwise it says 'check' and a supervisor decides
  • Dust and noise readings are indicative; sites with a planning condition still need the monitor that condition names
  • Heat from one point at the gate may not match a distant work area; the site's own heat plan decides the rest schedule
  • Workers' privacy and consent; no face recognition, passes only, blurred frames
  • Hire fleets: the turnstile moves between sites; it pairs to each site and works as a plain turnstile until paired

Design stage only: nothing on this page is for sale. Specifications and prices are targets.