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Enabling better global research outcomes in soil, plant & environmental monitoring.

AT-100 microCache Logger

The new Apogee AT-100 microCache (µCache) Bluetooth Micro Logger connects directly to several Apogee sensors. Features live meter mode, stand-alone datalogging, and graphing using our free Apogee Connect App for iOS and Android.

The AT-100 is a ruggedized, battery-powered, Bluetooth® Low Energy, single-sensor datalogging device that currently interfaces with Apogee’s quantum sensor line, with other Apogee sensors coming soon. When used as a standalone field-logging device, the unit features enough memory to store 9 months of one minute data using the internal battery. Data can be viewed on your mobile device using our free Apogee Connect App software for iOS and Android devices, with a Wifi gateway coming soon. Apogee Connect features live meter mode, real-time graphing, and the ability to send datasets to your computer via email.

View Real-time Data

Transmits real-time data to iOS and Android devices using the Apogee Connect app. Download the app here at the Google Play Store.  The iOS version of app is available on the App Store.

Datalogging Mode

Stores over 400,000 entries, (9 months of 1-minute data) with programmable sampling and logging Intervals.

High Resolution Readings

Processor features a 24 bit analog-to-digital converter.

Rugged Housing, Warranty and Support

IP67 rated for harsh environments. The µCache is backed by a 4 year warranty and outstanding customer support.

Compatible with Multiple Apogee Sensors

Currently connects with the SQ-110 Original Quantum, SQ-120 Original Quantum, SQ-500 Full-spectrum Quantum, SQ-620 Extended Range PFD sensor, SQ-640 Quantum Light Pollution sensor, albedometer, S2-141 PAR-FAR sensor, S2-131 Red – Far-red sensor, and more coming soon!



Measuring PAR with the Apogee µCache Logger


How to Choose a Quantum Sensor


Apogee microcache with Quantum Sensor Quickstart Guide


µCache (AT-100)
Communication Protocol Bluetooth® Low Energy (Bluetooth 4.0+)
Bluetooth Range approx. 45 m (line-of-sight)
Data Logging Capability Averaging Interval: 1-60 minutes
Sampling Interval: ≥ 1 second
Data Log Capacity Over 400,000 Entries (approx. 9 months at a 1-minute logging interval)
Time Accuracy ± 30 seconds per month at 0° C – 70° C
Battery Type 2/3 AA 3.6 Volt Lithium Battery
Battery Life
(impacted by sampling interval
and amount of time connected to a mobile app)
approx. 1 year w/ 10-second sampling interval and an average of 5 minutes daily connected time
approx. 2 years w/ 60-second sampling interval and an average of 5 minutes daily connected time
Operating Environment -40 to 85 C
Dimensions 66 mm length, 55 mm width, 18 mm height
Weight 52 g
IP Rating IP67
Connector Type M8
ADC Resolution 24 bits