T&D RTR500B Wireless Data Loggers and WebStorage Service

T&D Corporation is a Japanese maker of data loggers based in Matsumoto City, in business since 1986, with distributors in over 60 countries. It addresses the need of warehouses, transport operators, food businesses, pharmacies and laboratories to record temperature and humidity continuously and receive alarms without manual readings.

The RTR500B series is a wireless logging system: remote loggers send readings by short-range radio, reaching a base unit at about 150 m in direct line, and base units forward the data. The RTR500BW uploads over wired or wireless LAN, the RTR500BC connects to a PC by USB and the RTR500BM uses 4G to send data from up to 20 loggers where no PC or LAN is available, such as transport. Data goes to the free T&D WebStorage Service, which shows readings and graphs on PC, smartphone or tablet, sends e-mail or SMS warnings and offers an API. Loggers are configured by Bluetooth through a smartphone app.

• RTR500B remote loggers: wireless temperature and humidity loggers configured by Bluetooth from a smartphone.
• RTR500BW base unit: uploads data to the cloud or a server over wired or wireless LAN.
• RTR500BM 4G collector: forwards data from up to 20 loggers over 4G mobile networks.
• T&D WebStorage Service: free cloud for viewing data, graphs and warnings from any device.
• Warning monitoring: e-mail and SMS alerts plus contact output for on-site alarms.
• Broad sensor range: models for temperature, humidity, CO2, illuminance, UV, pressure, voltage and pulse.

• A pharmacy or vaccination chain in Vietnam can monitor vaccine refrigerators at each outlet and receive SMS alarms centrally.
• A cold storage operator can cover multiple rooms with wireless loggers and LAN base units.
• A food distributor can install a 4G collector on refrigerated trucks to record cargo temperature during delivery.

• The T&D WebStorage cloud service is free, so monitoring does not require a monthly software subscription.
• The 4G RTR500BM collects data from up to 20 loggers where no PC or LAN exists, such as vehicles and remote sites.
• E-mail and SMS warnings plus a contact output for buzzers or lamps help staff react quickly to temperature excursions.
• Vaccine-monitoring models TR71A2 and TR75A2 are stated to meet CDC Vaccines for Children requirements.

Food safety rules and good storage and distribution practices for medicines push warehouses, pharmacies and clinics to replace manual temperature logs with wireless loggers and cloud alerts. In Vietnam, pharmacy chains, vaccination centers and cold storage operators are expanding quickly and need affordable, continuous records for inspections.

T&D Corporation is headquartered in Matsumoto City, Japan, and has operated since 1986, launching a 40th anniversary website in October 2026. It reports distributors in over 60 countries, including an Asia region network. The older RTR-500 series has been replaced by the RTR500B series, and an EN12830 certification for some legacy models expired in May 2026.