The RTR-501 with internal sensor provides optimum waterproof and dustproof capabilities. This is the perfect Data Logger for use in harsh environments: whether that may be indoor frozen or refrigerated storage or high humidity, high dust outdoor applications. Moreover, the compact lightweight design means it can be placed just about anywhere.   Technical Specifications:   Measurement Item: Temperature Measurement Range: -40 to +80C Sensor: Internal Measurement Accuracy: Avg. +/- 0.5C Measurement Display Resolution: 0.1C Logging Capacity: 16,000 Readings LCD Display Battery Life of about 10 to 12 months Wireless or Optical communication Wireless Transmission Range: About 150 meters   In order to Download data via wireless communication, it is necessary to purchase a base unit: RTR-500GSM, RTR-500, RTR-500AW/NW, or RTR-500DC

Extended Battery. The RTR-501 with internal sensor provides optimum waterproof and dustproof capabilities. This is the perfect Data Logger for use in harsh environments: whether that may be indoor frozen or refrigerated storage or high humidity, high dust outdoor applications. Moreover, the compact lightweight design means it can be placed just about anywhere.   Technical Specifications:   Measurement Item: Temperature Measurement Range: -40 to +80C Sensor: Internal Measurement Accuracy: Avg. +/- 0.5C Measurement Display Resolution: 0.1C Logging Capacity: 16,000 Readings LCD Display Battery Life of about 4 Years! Wireless or Optical communication Wireless Transmission Range: About 150 meters   In order to Download data via wireless communication, it is necessary to purchase a base unit: RTR-500GSM, RTR-500, RTR-500AW/NW, or RTR-500DC

The RTR-502 is similar to the 501 but offers a wide range of external sensors to meet your needs: from ones with stainless steel protection to those who can be used in water. For more details on the optional sensors available please contact us.  Technical Specifications:   Measurement Item: Temperature Measurement Range: -60 to +155C Sensor: Internal Measurement Accuracy: Avg. +/- 0.5C Measurement Display Resolution: 0.1C Logging Capacity: 16,000 Readings LCD Display Battery Life of about 10 months Wireless or Optical communication Wireless Transmission Range: About 150 meters   In order to Download data via wireless communication, it is necessary to purchase a base unit: RTR-500GSM, RTR-500, RTR-500AW/NW, or RTR-500DC

Extended Battery. The RTR-502 is similar to the 501 but offers a wide range of external sensors to meet your needs: from ones with stainless steel protection to those who can be used in water. For more details on the optional sensors available please contact us.  Technical Specifications:   Measurement Item: Temperature Measurement Range: -60 to +155C Sensor: Internal Measurement Accuracy: Avg. +/- 0.5C Measurement Display Resolution: 0.1C Logging Capacity: 16,000 Readings LCD Display Battery Life of about 4 Years! Wireless or Optical communication Wireless Transmission Range: About 150 meters   In order to Download data via wireless communication, it is necessary to purchase a base unit: RTR-500GSM, RTR-500, RTR-500AW/NW, or RTR-500DC

RTR51A Wireless temperature data logger with integral sensor which can measure and record temperatures from -40 to 80 degrees. Small battery version with approx 9 m onths battery life.

RTR51AL Wireless temperature data logger large battery version -40 to 80 degrees. Battery life of approx 3 years (battery sold seperately).

RTR52A Wireless temperature data logger (requires external sensor) which can measure and record temperatures from -60 to 155 degrees. Small battery version with approx 9 months battery life.

RTR52AL Wireless temperature data logger -60 to 155 degrees large battery version (battery sold seperately). External sensor required (sold seperately).

RTR52Pt Wireless temperature data logger -199 to 600 degrees designed to be used with a three wire Pt100/ Pt1000 temperature sensor (purchased seperately). Small battery version with approx battery life of 9 months.

RTR52PtL Wireless temperature data logger, large battery version, (battery sold seperately). approx 3 year battery life. -199 to 600 degrees. with external sensor Pt100/Pt1000 sold seperately.

RTR53A Wireless temperature and humidity data logger which will simultaneously measure and record temperature within a range of 0 to 55 degrees and humidity within a range of 10 to 95%RH.

RTR53AL Wireless temperature and humidity data logger (large battery version, battery sold seperately). Measures temperature within a range of 0 to 55 degrees and humidity within a range of 10 to 95%RH.

RVR52A Wireless data logger for voltage/pulse/event.

RVR52AL Wireless data logger for voltage/pule/event, large battery version (battery sold seperately).