TCG240D GSM Logger with 4 x digital inputs suitable for digital pulses from rain gauges, flow meters, power meters, etc, or digital state changes from alarms. Digital Inputs: Non isolated dry contacts, maximum input +5.5vDC, Sampling Rates: 16Hz, 4Hz, 2Hz, 1, 2, 3, 4, 5, 6, 10, 15, 20, and 30 seconds, Digital Logger Capacity: 70,000 records. The TCG240D can send alarms to up to 5 designated mobile number. Data can be transmitted to our M2M Web Interface, via FTP or to an email address. Configuration via USB, SMS and HTTP API. Power supply: 1 x 3.6 V non-rechargeable Li-SOCI2 size D. Supplied in a weatherproof IP65 case, dimensions: 122 x 120 x 55mm, with cable glands. Operating Temperature: -20 to + 50°C. Required a micro SIM card.