
Calibration Certificate
Ensure regulatory compliance and audit-ready documentation with an official calibration certificate ...

Monitor and log temperature, humidity, dew point, and barometric pressure with precision using the Disc Maxi 4-in-1 — the most comprehensive wireless environmental data logger in our range, trusted by meteorological stations, cleanrooms, research laboratories, and altitude-sensitive storage applications.
Incorporates the proven BME280 environmental sensor from Bosch Sensortec, combining four critical measurements in one compact device. With 25,000 data points of on-board storage, programmable threshold alerts to your phone, and long battery life — ideal for applications where atmospheric pressure monitoring is essential alongside standard environmental conditions.
Perfect for weather monitoring, altitude compensation, cleanroom certification, HVAC validation, and scientific research requiring complete environmental data.
Recent Bluetooth Low Energy technology for reliable, long-range connectivity.
Extended battery life with user-replaceable CR2477 coin cell.
±0.5°C temperature accuracy for reliable monitoring.
On-device storage for up to 25,000 readings with configurable intervals.
iOS and Android apps for real-time monitoring, alerts, and data export. APIs to integrate into your own apps or systems.
Can be internet enabled by utilizing the BM Gateway and bmCloud.

Ensure regulatory compliance and audit-ready documentation with an official calibration certificate ...

Transform your Bluetooth sensors into a 24/7 remote monitoring system with the BM Gateway — a compac...
The Disc Maxi 4-in-1 measures temperature, humidity, barometric pressure, and calculates dew point. The Bosch BME280 sensor chip provides all four measurements in a single compact device, making it ideal for comprehensive environmental monitoring.
The CR2477 battery typically lasts up to 5 years under normal use conditions. Battery life depends on the configured logging interval and environmental conditions. The battery is user-replaceable.
Barometric pressure monitoring helps track weather changes, altitude variations, and air pressure in sealed environments. It's valuable for weather stations, HVAC optimization, altitude-sensitive storage, and predicting weather patterns that may affect temperature-sensitive goods.
The Disc Maxi 4-in-1 has an IP54 rating, meaning it's protected against dust ingress and water splashes from any direction. It's suitable for indoor use and sheltered outdoor locations but not for submersion or direct water exposure.
The Disc Maxi 4-in-1 has a range of up to 100 meters in open space (line of sight). In indoor environments with walls and obstacles, typical range is 20-50 meters depending on building materials.
Yes, the bmLogger mobile app allows you to configure high and low threshold alerts for temperature, humidity, barometric pressure, and dew point. You'll receive push notifications when any reading exceeds your set limits.
The 4-in-1 adds barometric pressure sensing and uses the Bosch BME280 chip with ±0.5°C accuracy and 25,000 data points. The 3-in-1 uses the Sensirion SHT4x chip with higher ±0.1°C accuracy and 50,000 data points but without pressure sensing. Choose based on whether you need atmospheric pressure data or maximum temperature precision.