We are offering wireless data logging system.internal rhtemp sensors4 recording inputs: 4-20 ma, 0-1 v, pulse counter, pt100 2-wires, ntc, thermocouple j, k and tfully reliable monitoring networkcost effective systemmultiple alarms including sms to any locationlong range monitoringup to 65, 000 network unitslicense-free rf band worldwideoperating keypad and lcd display the datanet is a 16-bit data logging system with 4 inputs for direct measurement and recording of pt-100, thermocouple thermistor, voltage, 4-20 ma, frequency and pulse. Data transmission from units to the central computer utilizes the brand new zigbee wireless telemetry protocol. Zigbee wireless protocol uses a 2.4 ghz license-free frequency rf band. Each datanet unit also serves as a transmission repeater to neighboring units, forming a reliable mesh network of up to 65, 000 units. reliable bi-directional transmission ensuring no data losstransmission range can be constantly expanded by adding additional network unitsminimal costs thanks to wire-free infrastructureportable units facilitating easy deployment in various environmentsreceiver recognizes up to 8 end units and 16 repeatersrepeaters recognize up to 24 end units and 16 repeaters (simultaneously) dnl910 logger with 4 external sensor inputs for 4 to 20 ma, 0 to 1 v, pulse counter, pt100 2-wires, thermocouple j, k and t.dnl920 rhtemperature logger also has 4 external inputs as well as built-in temperature and humidity sensors.dnl810 mini datanet internal temperature and humidity (digital).dnl808 mini datanet external 10k ntc