ABH-300-TC
Thermocouple monitor
Autoclaves & ovens
Type-K thermocouple channels to +1000 °C for autoclaves, ovens and depyrogenation tunnels — with battery backup through the cycle.
Design visualization · 106.4 × 150.0 × 29.3 mm
ABH-300-TC — 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 | 9 (K-type thermocouples · Aux digital probes · Ambient T + RH + pressure) |
| K-type thermocouples | Exp-A (MAX31856) · −40…+1000 °C · ±1.5 °C or 0.4 % probe element · channel ±3.3 °C uncalibrated (≈±0.7 °C system-calibrated) |
| Aux digital probes | DS18B20 channels on Exp-A |
| Ambient T + RH + pressure | SHT41 + BMP390 on-board |
| Measurement accuracy | Sensor ±0.2 °C typ · ±0.4 °C max (0–65 °C) on-board SHT41 · system class 1 as-shipped on live USB (class 0.5 on battery / with USB power save) |
| 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 |
| Battery life | ≈78 d USB-loss backup (calculated, spec-compliant logging at firmware defaults; ≈47 d at −20 °C) — ≈78 d USB-loss backup (calculated) |
| 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 (monitor) · probe to +1000 °C |
| 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 | M12 probe ports + thermocouple terminals (Exp-A) · USB-C |
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.
- Cold-junction-compensated MAX31856 front end per channel
- Fiberglass-cable probes with Inconel sheaths rated for the chamber
- Cycle records land in the same compliance platform as the cold chain
- Autoclaves, ovens & sterilizationType-K thermocouple input to +1000 °C with battery backup through the cycle.
- PRB-TC-K-3M — Type-K thermocouple probePRB-TC-K-3M · PRB-TC-K-5M · PRB-TC-K-3M-HT (ceramic)
- ABH-300-TC 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-TC 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.