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Reference · Terrestream Indoor Air Quality Sensor

Sensor Compliance & Documentation Index

Effective June 1, 2026 · Version 1.0 · Operational reference; the Terms of Service control.

This page identifies the third-party environmental and ambient-sensing components incorporated in the Terrestream Indoor Air Quality Sensor (the “ Device ”) and provides convenience-only links to the component-manufacturer documentation referenced by §7.1 of the Terms of Service. The Terms of Service control; this page is operational reference material only.

Product datasheet (Aerodyne-authored)

The Aerodyne-authored one-page product datasheet for the Device is available as a PDF and is the canonical summary of the Device’s features, sensing capabilities, processing, connectivity, power, and compliance posture:

  • Terrestream Indoor Air Quality Sensor — Product Datasheet (document TSR50035DAI, May 2026) — local copy (PDF)

This datasheet is authored, controlled, and maintained by Aerodyne Inc. and is not subject to the third-party “convenience-only / no-warranty / no-attestation” framing below, which applies only to component-manufacturer documents. Numerical specifications in the datasheet derive from the relevant component manufacturers’ published datasheets indexed below; to the extent any value summarized in the Aerodyne datasheet is in tension with a then-current component-manufacturer datasheet, the component-manufacturer datasheet controls for that component.

⚠️ Convenience-only reproduction; no warranty; no attestation

The datasheets and component-manufacturer documents linked or hosted from this page are provided for User convenience only. Aerodyne Inc., Terrestream, and their affiliates (collectively, “ Terrestream ”) do not author, control, or maintain those documents and make no representation or warranty, express or implied, as to their accuracy, completeness, currency, authenticity, fitness for any particular purpose, or non-infringement. Local copies hosted at terrestream.com/datasheets/ are point-in-time captures provided to reduce dead-link risk; they are not authoritative and may lag the component manufacturer’s then-current revision. The authoritative source is, in every case, the component manufacturer’s public product page at the URL cited below.

No attestation by Terrestream. Terrestream does not attest to, endorse, or independently verify any statement contained in a third-party datasheet, design guide, testing guide, specification statement, or other component-manufacturer publication. Reproduction or linking from this page is for User reference and does not constitute adoption, ratification, or warranty of the underlying content. The component manufacturer is solely responsible for the accuracy of statements it publishes about its own components, and the User may independently verify any cited statement against the manufacturer’s then-current public documentation at the cited URL.

Relationship to the Terms of Service. This page is the “sensor-compliance” reference identified in §7.1 of the Terms of Service. To the extent any statement on this page is in tension with the Terms of Service, the Privacy Policy, or the Plain Language Summary, the binding instruments at terrestream.com/legal control. The non-reliance, no-extrinsic-representation, and limitation-of-liability provisions of the Terms of Service (including, without limitation, §§ 7, 14, and 15) apply to this page in full.

Bill of materials by configuration

The following table identifies the environmental and ambient-sensing components by Device configuration. Current production Devices ship in the Standard configuration, in which carbon-dioxide is measured by the Sensirion SEN66 module-level photoacoustic channel. The High-CO2 configuration, which adds the dedicated Sensirion SCD43, is a planned future configuration and is not offered in current production. Component identification is updated on bill-of-materials change; prior revisions are preserved in the changelog below.

Sensor Function Standard configuration High-CO2 configuration
Sensirion SEN66 PM1.0, PM2.5, PM4.0, PM10, VOC index, NOx index, temperature, relative humidity, CO2 (module-level) Installed Installed
Sensirion SCD43 CO2 (photoacoustic, dedicated high-accuracy) Not installed Installed
Bosch BMP390L Barometric pressure Installed Installed
Texas Instruments OPT3001 Ambient illuminance (display-management auxiliary) Installed Installed

Current production Devices use the Sensirion SEN66 module-level photoacoustic channel for carbon-dioxide measurement. Where a future High-CO2 Device configuration includes the Sensirion SCD43, that Device’s primary CO2 measurement is the SCD43 reading; the SEN66 module-level CO2 channel is retained for cross-check, redundancy, and span/drift monitoring.

Sensirion SEN66

Manufacturer. Sensirion AG, Stäfa, Switzerland. Function. Multi-parameter environmental sensor node. Measures particulate matter (PM1.0, PM2.5, PM4.0, PM10), VOC index, NOx index, temperature, relative humidity, and module-level CO2. Authoritative source. Sensirion AG, SEN66 product page, sensirion.com/products/catalog/SEN66.

Convenience-only local copies (captured June 1, 2026):

Building-standard statements published by Sensirion concerning the SEN66 are reproduced at Terms of Service §7.1 and are not restated here.

Sensirion SCD43

Manufacturer. Sensirion AG, Stäfa, Switzerland. Function. Photoacoustic carbon-dioxide (CO2) sensor providing dedicated, high-accuracy CO2 measurement in Device configurations that include it. It is part of the High-CO2 configuration only, which is a planned future configuration; it is not populated in current production Devices. Authoritative source. Sensirion AG, SCD43 product page, sensirion.com/products/catalog/SCD43.

Convenience-only local copies (captured June 1, 2026):

Building-standard statements published by Sensirion concerning the SCD43 are reproduced at Terms of Service §7.1 and are not restated here.

Bosch BMP390L

Manufacturer. Robert Bosch GmbH (Bosch Sensortec), Reutlingen, Germany. Function. Barometric-pressure sensor. Authoritative source. Bosch Sensortec, BMP390 product page, bosch-sensortec.com/products/environmental-sensors/pressure-sensors/bmp390.

Convenience-only local copy (captured June 1, 2026):

As noted in Terms of Service §7.1, barometric pressure is not a parameter governed by RESET® Air, the WELL Building Standard™, ANSI/ASHRAE 62.1, California Title 24, or LEED Indoor Environmental Quality credits; Bosch publishes no indoor-air-quality building-standard compatibility statement for the BMP390L, and none is reproduced here.

Texas Instruments OPT3001

Manufacturer. Texas Instruments Incorporated, Dallas, Texas, USA. Function. Ambient light sensor (ALS) reporting illuminance in lux. In the Device, the OPT3001 is used to drive auxiliary display-management behavior (e.g., screen-brightness adaptation and night-mode transitions). The OPT3001 is not used as an indoor-air-quality parameter and does not contribute to any IAQ index reported by the Device. Authoritative source. Texas Instruments, OPT3001 product page, ti.com/product/OPT3001.

Convenience-only local copy (captured June 1, 2026):

As noted in Terms of Service §7.1, ambient illuminance is not a parameter governed by RESET® Air, the WELL Building Standard™, ANSI/ASHRAE 62.1, California Title 24, or LEED Indoor Environmental Quality credits; Texas Instruments publishes no indoor-air-quality building-standard compatibility statement for the OPT3001, and none is reproduced here.

Bill-of-materials changelog

This page is versioned. Material changes to the Device bill-of-materials — including substitution, addition, or removal of an environmental or ambient-sensing component — will result in a new published version of this page, preserved in the version archive at /legal/archive.

  • June 1, 2026 · v1.0. Initial publication. BOM: Sensirion SEN66, Sensirion SCD43 (high-CO2 configuration only), Bosch BMP390L, Texas Instruments OPT3001.

Cross-references

  • Terms of Service §7.1 — binding third-party-sensor-component disclosure and component-manufacturer building-standard statements.
  • /legal/accreditation — device-level accreditation status (distinct from component-level statements).
  • /legal/sub-processors — third-party data processors (distinct from component manufacturers).