The M844 is a robust, ultra-low power Data Acquisition & Communication Module. This completely autonomous monitoring and data logging solution is independent from local infrastructures, using GSM/GPRS communications and solar panel, battery or AC/DC power options.

Signal Inputs:

• 4 (isolated) analog inputs.
• 3 digital status-/pulse inputs.
• 1 coil input.
• Modbus communication protocol (RS485 / RS232).
• SDI-12 communication protocol.

• Completely autonomous monitoring and data logging using GSM/GPRS communications and solar panel, battery or AC/DC power options.
• Easy configuration, local through USB 2.0 or remotely by smart reversed communication.
• Data logging by 2GB micro-SD card for over 10 million data entries.
• Resistant to harsh environments with the IP67 / NEMA4X GRP field mount enclosure.
• Full compliance with the ProcessMonitor web-portal or ProcessView software for data history, graphic visualization and/or alarming.
• 110 - 230V AC mains and reverse polarity protected 8 - 30V DC power supply, battery or solar powered.
• Reduce maintenance costs as internal battery will last for 3 - 8 years.
• Stabilized 24V DC sensor excitation for mains powered versions.
• Energy management sensor onboard, accurately calculates the remaining battery lifetime.
• Integrated Quad-band GPRS antenna; no “eye-catchers” to prevent vandalism or abuse.
• Wide operating temperature range -30°C to +75°C.
• Flexible mounting possibilities (wall/panel/pipe).

• Perfectly suitable for off-grid or hard to reach locations.
• For level, flow, weight/mass, temperature, pressure, dissolved oxygen, pH, vibration and/or energy/fuel consumption applications.
• Logistic and Supply Chain (SCM) optimization for raw bulk materials. Remote Silo/Tank Monitoring, Remote Inventory Management, Customer and Vendor Managed Inventory (VMI).

• Completely autonomous monitoring and data logging solution independent from local infrastructures, using GSM/GPRS communications and solar panel, battery or AC/DC power options.
• Easy and time saving configuration through local USB 2.0 by bright and clear terminal interface (no code input!) or remotely through smart reversed communication, even when the M844 has a public, dynamic IP address.
• Flexible freedom in data communication by TCP, FTP and/or e-mail. 
• Alerts and alarms by SMS.
• Universal and versatile applicable for different kind of sensors and instruments through 4 (isolated) analog, 3 digital status-/pulse inputs, 1 coil input and on board Modbus and SDI-12 communication protocol.
• Data logging by 2GB micro-SD card, for over 10 million data entries with date and time stamp.
• Reduce maintenance costs and service time as even the optional internal battery will last for 3 - 8 years.
• Better cause-effect retrieval with increased log interval and alarming when set point is triggered.
• Resistant to harsh environments with the rugged GRP field mount enclosure IP67 / NEMA4X with an “all-on-board” module inside.

• Smart bidirectional digital communication between the Guidense TDR200-SMART and the M844.
• GPRS data communication through TCP, FTP and/or email.
• Full control through the web-portal or the ProcessView software.
• Process alarms and system alerts by SMS.

• These solar powered, combined field devices are extremely suitable for off-grid and hard to reach locations.
• Suitable in almost every liquid and solids - independent of changing process conditions, such as density, conductivity, temperature, pressure, vapour, turbulence, low dielectric constant or low reflectivity.
• The Guidense has almost no installation restrictions: small tanks, tall and narrow nozzles or difficult tank geometries or close to interfering structures.

• Entirely autonomous monitoring and datalogging using GSM/GPRS communications and solar panel, battery or AC/DC power options.
• Full control to easily read, modify, store and analyse all process parameters from anyplace, anywhere, anytime.
• Easy and time saving remote configuration through Smart bidirectional digital communication.
• Full compliance with the ProcessMonitor web-portal or ProcessView software for data history, graphic visualization and/or alarming.
• Data logging by 2GB micro-SD card for > 10 milion data entries.
• Resistant to harsh environments as Guidense TDR200-SMART is IP68/NEMA6P and the M844 is IP67 / NEMA4X.
• 110 - 230V AC mains and reverse polarity protected 8 - 30V DC power supply, battery or solar powered.
• 3 types: Single rod probe, Wire rope probe and Coaxial probe.
• Very easy to install due to plug-and-play connectors.

Increase your service level, optimize your processes from anyplace, anywhere, anytime