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Internal sensor data logger.

RTR-51 Wireless Temperature Data Logger with internal sensor, can measure and record
temperatures from -40 to 80°C.
RTR-51L Wireless Temperature Data Logger with internal sensor, can measure and record
temperatures from -40 to 80°C.
Large Capacity Battery Type. The RTR-51 is IEC rated for a water resistance of IP-67, which is full immersion.
Note:
The main unit is designed for use in environments with an ambient temperature of between -40 to 80°C,
but in an environment with a temperature of below -30°C communication will not be possible.

RTR-51 Wireless Temperature Data Logger

Model  Description 
RTR-51   Wireless Temperature Data Logger with internal sensor
RTR-51L  Wireless Temperature Data Logger with Large Battery
RTR-51 Data Logger specifications
RTR-51/51L
Measurement Channel 1Temperature Channel
Internal Temp. Sensor -40 to 80°C
Measurement Display Resolution 0.1°C
Measurement Accuracy Avg ±0.5°C
Recording Interval 1,2,5,10,15,20,30 seconds / 1,2,5,10,15,20,30,60 minutes
Total of 15 choices
Recording Capacity 16,000 Readings x 1 Channel
Recording Mode Endless (Overwrite oldest data when capacity is full) /
One-time (Stop recording when capacity is full)
LCD Display Items Current Readings / Recording Settings / Battery Life Warning /
Over Measurement Range Warning / Amount of Recorded Data
Power Lithium Battery (LS14250(SAFT)) x 1 or AC Adaptor (sold separately) *2
Battery Life*3 Approximately 6 months
Wireless Method FCC Part 15 Section 249 / IC RSS-210
Transmission Range Approximately 100m (May vary with conditions)
Dimensions H62mm x W 47mm x D19mm (excluding protrusions / antenna length 20mm)
Interface Wireless Communication / Optical Communication
Communication Speed When downloading data (Wireless) about 2,000 readings per minute
[Collection of a full unit of data= about 420 seconds (optical communication= about 160 seconds)]
Water Resistance *4 IP67 - (immersion proof) IP64 (rated for use in daily life)
Unit Temp. Resistance -40 to 80°C
Others RTR-51/52/52Pt/53: In order to download data via wireless communication, it is necessary to purchase either an RTR-57U, RTR-5W, and/or RTR-50 unit.
-For optical communication, TR-50C can also be used for all types of units.