ABH-300
Industrial multi-probe monitor
Mapping-grade coverage
Four PT100 channels plus on-board T/RH and barometric pressure — stability chambers, walk-in rooms and mapped ULTs on one instrument.
Design visualization · 106.4 × 150.0 × 29.3 mm
ABH-300 — every number a QA team asks for
Channel-level accuracy, memory depth in readings, enclosure geometry and the firmware trust chain — the full picture before you ask for the pilot.
| Product type | Industrial · Wi-Fi monitor |
| Sensing channels | 7 (4 × probe temperature · Ambient T + RH · Pressure) |
| 4 × probe temperature | PT100 Class A via probe board (MAX31865 ×4) · −50…+200 °C |
| Ambient T + RH | SHT41 · ±0.2 °C typ |
| Pressure | BMP390 · 300–1250 hPa |
| Measurement accuracy | Probe element ±0.15 °C at 0 °C (PT100 Class A, IEC 60751) · channel ±0.62 °C uncalibrated → ±0.36 °C after 4-point factory calibration |
| Display & indication | 1.54″ e-paper 200 × 200 · −25…+50 °C · holds last reading while asleep |
| Connectivity | Wi-Fi 2.4 GHz (ESP32-C3-MINI-1U) · MQTT over TLS 1.2+ — Internal FPC · ≤2 dBi |
| Power | USB 5 V + Molicel P28A 18650 pack (2600 mAh min) · JEITA-gated charging |
| Battery life | ≈82 d USB-loss backup (calculated, spec-compliant logging at firmware defaults; ≈50 d at −20 °C) — Keeps logging through USB-loss |
| Memory | 16 MB W25Q128JV · 409,600 readings · separate never-erased audit region |
| Sample interval | 1 s minimum · configurable |
| Enclosure | 106.4 × 150.0 × 29.3 mm · PC/ABS · UL94 V-0 · UV-stabilised · RAL 7035 grey |
| Ingress protection | IP65 (design target) |
| Mounting | Keyhole (2×) + bonded magnets · M12 cable ports |
| Operating band | −25 to +50 °C (e-paper limit) |
| Firmware | Signed .abhfw packages · dual-bank A/B · RSA-2048 · trial boot with automatic rollback · MQTT over TLS 1.2+ with per-device credentials · X.509 client certificates / mTLS on the roadmap |
| Factory identity | ABH-[model]-[YYWW]-[5-digit sequence] — factory identity written to the ID EEPROM |
| Ports | 4 × M12 probe ports · USB-C |
| Expansion | J5 FFC-16 accepts Exp-A…F cards |
The ABH line is at the design-frozen, pre-production stage: every enclosure has passed generated fit-check geometry (791/791 checks, 20/20 SKUs) and every battery-life, drop, thermal and IP figure shown is a calculated or simulated design estimate — measured values replace them as validation hardware runs. Regulatory marks above are the certification roadmap, not held certificates.
- Probe board adds four independent Class-A RTD channels over one FFC
- Battery backup rides through facility power work without a data gap
- UV-stabilised RAL 7035 housing for chamber rooms and industrial washdown zones
- Cold rooms & large sitesExternal high-gain antenna (LR) or industrial multi-probe coverage for mapped rooms.
- ULT freezers & dry iceLogger stays outside the freezer; a Class-A PT100 probe measures inside — accuracy where it matters.
- Stability chambers & mapping studiesFour PT100 channels plus T/RH and barometric pressure — one instrument per mapped chamber.
- PRB-PT100-3W — PT100 immersion probePRB-PT100-3W-3M · PRB-PT100-3W-5M · PRB-PT100-3W-10M
- ABH-200-LR — Long-range online monitor
- ABH-100-D — Dry-ice & ULT logger
- ABH-300 datasheetPDFFull specification, applications and probe options
- ABH range overviewAll 20 SKUs and the platform story
- Platform capability briefSoftware, compliance and architecture
Datasheets describe the current design release (ABH-PLATFORM 0.0.4). Battery-life and IP figures inside are calculated design estimates; measured values follow validation hardware.
One PCB, one firmware, one compliant record
One 80 × 50 mm 4-layer platform PCB — 146 parts, single-sided SMT — becomes 20 SKUs by BOM selection and a SKU record in the on-board ID EEPROM.
Signed .abhfw packages · dual-bank A/B · RSA-2048 · trial boot with automatic rollback
MQTT over TLS 1.2+ with per-device credentials · X.509 client certificates / mTLS on the roadmap
Plug an offline logger into a PC and it enumerates a FAT16 drive with README.TXT, DATA.CSV and an ECDSA P-256-signed REPORT.PDF — a self-verifying trip record.
Probe channel templates live in the ID EEPROM; the platform tracks NIST-traceable calibration certificates, due dates and reminders per probe.
Certification roadmap: EN 12830:2018 — temperature recorders · CE — RED / EMC / safety · FCC Part 15 · WHO PQS E006 — vaccine cold chain · IEC 61010-1 / IEC 62368-1 · UN 38.3 / IEC 62133-2 — cells & packs — targets, not held certificates.
Put the ABH-300 to work
Book a demo and we'll scope a pilot around your sites — quantities, probes, alert rules and the reports your QA team will hand the inspector.