Sentry Telemetry - Leading supplier of GSM Telemetry and Telemetry systems Sentry Telemetry started monitoring LPG tanks in 1997 and has now progressed to be a leading worldwide authority on radio, GSM, GPRS and satellite technology that can be integrated into a vast array of M2M solutions for business, industry and home. We design, develop, supply and install a diverse market range of remote monitoring, telemetry, control and sensing equipment based around low cost proven communications devices. In addition to supplying off the shelf products and engineered solutions, we also provide services such as software and web hosting of data.