The SDI-12 Verifier gives you assurance that your SDI-12 sensor is in compliance with the SDI-12 standard. If your sensor is not in compliance, it will help you find the problems. The Verifier performs complex tests quickly, saving you time and money.

Please visit www.sdi-12.org for information about SDI-12.

The Verifier can also simulate an SDI-12 sensor and monitor the SDI-12 bus to help test SDI-12 data recorders.

The Verifier is a PC based system with three components:

1. Hardware to interface a USB port to the SDI-12 bus.  This interfaces PCs to SDI-12 sensors and data recorders.
2. Firmware to communicate with the PC and SDI-12 devices, execute tests, time events, simulate sensors, and control the SDI-12 bus.
3. PC software to test SDI-12 sensors and recorders (runs on Microsoft Windows: XP, Vista, Windows 7, Windows 8, and Windows 10).

The Verifier can test:

• all SDI-12 commands;
• all versions of SDI-12 (1.0, 1.1, 1.2, 1.3, and 1.4);
• the timing of SDI-12 bus transactions;
• the ability of sensors to respond to a break;
• the ability of sensors to wake up within 100 milliseconds after a break;
• the ability of a sensor to respond within 15 milliseconds after receiving the last byte of a valid command;
• the ability of sensors to return to low power standby mode;
• the ability of sensors to reset upon receipt of a break when taking a measurement;
• the ability of sensors to take concurrent measurements;
• the correct use and timing of service requests;
• the proper use of parity;
• data retention after taking a measurement;
• the correct computation of CRC values;
• extended commands;
• and more ...

The Verifier also:

• monitors the SDI-12 bus and displays all commands and responses exchanged between an SDI-12 recorder and sensors;
• operates as an SDI-12 data recorder;
• simulates an SDI-12 sensor to help test data recorders;
• has an SDI-12 transparent mode;
• can have numerous sensors connected to it;
• has a detailed user's guide;
• functions as a interface between a PC and one or more SDI-12 sensors using a PC communications program such as HyperTerminal, without using the Verifier's PC software.