# Cold chain data logger > SigmaWit is a quality company focused on thermo-hygrometer instruments; Thermo-hygrometer products, Thermo-Hygrometer devices, thermo-hygrometer equipment, and thermo-hygrometer so SigmaWit is a quality company associated with thermo-hygrometer and Thermo-Hygrometer products. ## Products - [USB Disposable Temperature Data Logger](https://www.sigmawit.com/product/1301919982862012416.html): Details on SigmaWit's USB disposable temperature data logger, a single-use device for cold chain monitoring with USB interface for data retrieval. - [Single-use Data Loggers](https://www.sigmawit.com/product/1.html): Overview of single-use data loggers for temperature and humidity monitoring, designed for one-time use in shipping and storage. - [Reusable Data Loggers](https://www.sigmawit.com/product/2.html): Information on reusable USB data loggers that collect and record temperature and humidity data, suitable for multiple uses. - [Thermo-Hygrometer](https://www.sigmawit.com/product/3.html): Bluetooth thermometer sensor and hygrometer devices that measure temperature and humidity, with wireless data transmission capabilities. - [Ultra-low Temperature Loggers](https://www.sigmawit.com/product/8.html): Ultra-low temperature data loggers designed for monitoring extreme cold environments such as dry ice storage and cryogenic shipping. - [Vaccine Transportation](https://www.sigmawit.com/product/5.html): Temperature monitoring solutions for vaccine transportation, ensuring compliance with cold chain requirements during distribution. - [Fruit & Food Transportation](https://www.sigmawit.com/product/6.html): Data loggers for monitoring temperature and humidity during fruit and food transportation to maintain quality and safety. - [Commercial & Industry](https://www.sigmawit.com/product/7.html): Temperature and humidity data loggers for commercial and industrial applications, including warehouses, facilities, and process monitoring. ## Solutions - [Solutions](https://www.sigmawit.com/Solutions.html): Cold chain temperature data logger solutions for various industries, providing end-to-end monitoring and data management. ## Support & Download - [Support & Download](https://www.sigmawit.com/SD.html): Support resources and downloads for disposable data loggers, including software, manuals, and technical documentation. - [IOT APP Download](https://www.sigmawit.com/IOT.html): Download the SigmaWit IoT app for visualizing and managing temperature data from connected data loggers via cloud platform. - [Bluetooth APP Download](https://www.sigmawit.com/App_DownLoade.html): Download the Bluetooth app for SigmaWit data loggers, enabling wireless configuration and data retrieval from mobile devices. - [Document Download](https://www.sigmawit.com/Document_DownLoade.html): Download documents for USB temperature data loggers, including manuals and specifications. ## About Us - [About Us](https://www.sigmawit.com/OOS/3.html): Company overview and information about Sigmawit as a manufacturer of temperature and humidity loggers. - [OEM & ODM Service](https://www.sigmawit.com/OOS/2.html): Details on custom manufacturing services for cold chain PDF loggers and other products. - [Industrial Insights](https://www.sigmawit.com/blog/5.html): Articles and insights on industrial temperature monitoring and WiFi temperature loggers. - [Sigmawit Blog](https://www.sigmawit.com/blog/6.html): Blog posts covering vaccine temperature data loggers and related topics. ## Contact Us - [Contact Us](https://www.sigmawit.com/Contact.html): Contact information for inquiries about reusable temperature data loggers. ## Privacy Policy - [Privacy Policy](https://www.sigmawit.com/Privacy-Policy.html): Privacy policy outlining data collection and usage practices. ## mometer - [ULogs1 Temp Data Logger](https://www.sigmawit.com/detail/1.html): Product page for ULogs1 temperature data logger with specifications and features. - [ULogs3 Temp Data Logger with LCD](https://www.sigmawit.com/detail/3.html): Product page for ULogs3 temperature data logger featuring an LCD display. - [T201 BLE Thermo-hygrometer](https://www.sigmawit.com/detail/4.html): Product page for T201 Bluetooth-enabled thermo-hygrometer measuring temperature and humidity. - [Bluetooth USB Single Use Temperature Data Logger BULogs1](https://www.sigmawit.com/detail/5.html): Product page for BULogs1 single-use temperature data logger with Bluetooth and USB connectivity. - [ULogm2s USB Data Logger](https://www.sigmawit.com/detail/6.html): Product page for ULogm2s USB data logger for temperature monitoring applications. - [ULogs6 Temp Data Logger](https://www.sigmawit.com/detail/7.html): Details and specifications for the ULogs6 temperature data logger, including features, technical parameters, and application scenarios. - [T401 WIFI Thermometer](https://www.sigmawit.com/detail/9.html): Product page for the T401 WiFi thermometer, covering its wireless connectivity, temperature monitoring capabilities, and setup instructions. - [ULogs4 Temp&RH Data Logger with LCD](https://www.sigmawit.com/detail/14.html): Information on the ULogs4 temperature and humidity data logger with LCD display, including its measurement range, accuracy, and data storage capacity. - [BLogs1 BLE Temp Data Logger](https://www.sigmawit.com/detail/15.html): Overview of the BLogs1 Bluetooth Low Energy temperature data logger, highlighting its wireless data transmission and mobile app compatibility. - [BULogs1 BLE+USB Temp Data Logger](https://www.sigmawit.com/detail/16.html): Details for the BULogs1 temperature data logger with both Bluetooth and USB connectivity, including data retrieval methods and battery life. ## Log Cloud IoT System - [Log Cloud IoT System](https://www.sigmawit.com/introduce_1/1.html): Introduction to the Log Cloud IoT system, explaining its architecture, data management features, and integration with compatible data loggers. ## Optional - [robots.txt](https://www.sigmawit.com/robots.txt): robots.txt, crawler access rules for this website.