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Architecture The four-layer stack

Four layers.
One accountable record.

Sensor, monitor, dispatch, evidence. Each layer has one job. Together they convert a temperature reading on a riser into a court-admissible treatment record — without a clipboard or a quarterly site visit.

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01 Sensor layer

Coverage where it matters.

A site survey identifies the points where harbourage actually develops — riser cavities, skirting runs, under-equipment voids, sentinel rooms, drain surrounds. LoRaWAN sensors go in at those points and report temperature, relative humidity, and CO₂ every fifteen minutes. Bed bug and cockroach trap stations report binary catch events the moment they register one.

LoRaWAN is the right radio for this job: low power (ten-year battery life on an AA cell pair), long range (a single private gateway covers a typical hotel or care home end-to-end), and AES-128 encrypted. No SIM cards. No mobile data costs. No gateway in your kitchen taking up a power outlet.

TRANSMIT INTERVALevery 15 minutes
RADIOLoRaWAN · AES-128
BATTERY LIFE~10 years
Dragino LHT65N-NE117
temp ±0.1°C · RH · 10y battery
ALL VERTICALS
ELSYS ERS CO₂
CO₂ ppm · under-equipment voids
HELIX
Valpas / Spotta
event-based trap detection · binary
VESPER · HELIX
RAK7268V2 gateway
private LoRaWAN · 1 per building
INFRASTRUCTURE
02 Monitoring layer

A score, not a feed.

Raw sensor readings stream into GreenTech OS, where a composite Harbourage Risk Score is calculated on a seventy-two-hour rolling window. Temperature, relative humidity, CO₂, trap events, and a seasonal factor are each weighted into a single 0–10 score per site. A score above 7 sustained for more than 72 hours triggers a proactive treatment dispatch. A trap catch overrides the model entirely and dispatches immediately.

The point of a score is that it removes interpretation. A facility director does not need to read humidity charts; they read a number. So does the inspector reviewing the audit log.

WINDOW72-hour rolling
DISPATCH TRIGGERHRS > 7 (72h) or trap catch
CALIBRATIONphase 2 · n > 8,640 readings
HRS = w1·TempScore + w2·RHScore + w3·CO₂Score + w4·TrapScore + w5·SeasonalFactor
057 · threshold10
current HRS 1.8 · low
03 Dispatch layer

A technician, not a calendar.

Dispatch fires on the data, not the contract. When the score breaches or a trap catches, GreenTech OS issues a job card to a BPCA-certified technician on the marketplace. The technician claims, accepts, and is on-site inside the SLA — 24 hours for the standard tiers, 4 hours on Vesper Premium, 1 hour on Meridian Premium.

The treatment itself uses InsectoSec DE and PelGar Sumilarv 0.5G — both GB BPR authorised, both zero-COSHH, applied at the harbourage points identified in the survey. Every product placement is barcode-scanned to lot and batch level and GPS-stamped to the site. No pyrethroids. No exclusion zones. No room-out-of-service period.

SLA · STANDARD24 hours
SLA · MERIDIAN PREMIUM1 hour
TECHNICIAN STANDARDBPCA-accredited · RSPH L2
SiteHilton Bankside · room 412
Triggertrap catch · sensor VP-012
Dispatched11:27:08
TechnicianT. Williams · BPCA #BP-7291
ETA00:42:18
TreatmentInsectoSec DE · Sumilarv 0.5G
04 Evidence layer

A pack, not a paper trail.

Every reading and every treatment is hashed with SHA-256, stamped with GPS coordinates and an immutable timestamp, and written into the chain of custody. The chain is exported on demand into the compliance pack your inspector actually wants to see — Regulation 12 and 15 evidence for CQC, CCP records for FSA / HACCP, the monthly pest risk report for your insurer.

This is the layer the other three exist for. Sensors detect. Scores decide. Technicians act. But none of it survives an audit without a tamper-evident record. The pack is one click away, and it does not rely on anybody remembering to fill in a logbook.

HASHSHA-256 · 64-char fingerprint
DATA RESIDENCYAWS London (eu-west-2)
EXPORTSCQC pack · HACCP CCP · risk report
CQC Reg 12 / 15 pack
8 Apr 2026 · 14 site visits
d4e1…8a23
HACCP CCP records
12 CCP entries · lot/batch traceable
b7a2…f491
Monthly pest risk report
RAG-coded · 90-day trend
77c1…12af
Chain-of-custody certificate
per-treatment · GPS + photo
1b2e…8e0c
By the numbers

Quarterly visit. Or continuous evidence.

Same site, same regulatory framework, two operating models. The difference is what you can prove on inspection day.

Analog quarterly contract

Readings per year4 paper entries
Time covered~0.05%
Unmonitored days/year353
Treatment recordsite logbook
Tamper-evidentno
Audit-ready exportmanual

GreenTech four-layer stack

Readings per year8,760+
Time covered100%
Unmonitored days/year0
Treatment recordSHA-256 chain of custody
Tamper-evidentyes · cryptographic
Audit-ready exportone-click
Regulatory context Statutory pest-control obligations under the Food Safety Act 1990, the Health and Safety at Work etc. Act 1974, and the Health and Social Care Act 2008 remain with the operator. GreenTech provides continuous monitoring and documented treatment evidence to support those obligations; it does not discharge them.

Four layers. One compliance pack.

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