TR45 Bluetooth Temperature Logger, for use with external temperature probes Thermocouple Type K, J, T, S or PT100/PT1000, Thermocouple range -199 to +1700°C, or -199 to + 600°C, PT100/1000. Type K, J, T: ±0.3 °C + 0.3% of reading. Type S: ± 1°C + 0.3% of reading RTD's ±0.3°C + 0.3% of reading. Logging rate selectable 1 second to 60 minutes, 16000 reading memory, battery life 1 month to 1 year depending on sample interval. ...