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Cold Chain Temperature & Humidity Data Logger Manufacturer | SigmaWit
Sigmawit is committed to providing an end-to-end visual solution for the cold-chain industry with advanced sensors and IoT technology. We have a skilled R&D team, including industrial design, hardware, firmware, application software, cloud services, and testing engineers. We strictly adhere to the principles of lean production, strictly product quality control at every step from material inspection, and process control to finished product inspection. We continuously optimize product design and production processes, aiming to provide customers with higher cost-effective products. Our professional sales team can efficiently deliver each order in good condition and complete various OEM/ODM projects with excellent service.
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06 Aug,2025
Author： SigmaWit
03 Jan,2025
Author： SigmaWit
FAQ
What temperature data loggers does SigmaWit manufacture?
SigmaWit manufactures five main product families: single-use USB temperature loggers (ULogs series), reusable Bluetooth data loggers (BLog series), real-time 4G tracking loggers (GLogs series), WiFi data loggers with external probes (WLogmp series), and BLE thermo-hygrometers (T201 / T281). All products are designed and manufactured in our own factory in Shenzhen, China, for cold chain monitoring in food, pharmaceutical and industrial applications.
What is the difference between single-use and reusable data loggers?
Single-use loggers (ULogs series) are pre-calibrated and ready to use out of the box; after one shipment they are discarded or recycled, which makes them ideal for one-way exports and shared logistics. Reusable loggers (BLog and WLogmp series) can be stopped, restarted and re-deployed for many trips, lowering the cost per shipment for companies with high shipping volume. The right choice depends on whether you control the return of the device after delivery.
Which logger is recommended for vaccine transportation?
For vaccine shipments, we recommend the GLogs1 4G real-time data logger when live location and temperature monitoring is required, or a single-use ULogs logger for standard one-way shipments where a downloadable report is sufficient. Both support user-configured alarm thresholds, so the 2–8°C range commonly required for vaccine cold chain can be set before departure.
Can your data loggers be used in dry ice or ultra-low temperature shipments?
Yes. Our IULogs ultra-low temperature loggers are designed for deep-frozen logistics such as dry ice shipping. The exact measurement range differs by model —-80°C. Contact us with your target temperature range and we will recommend the matching model.
What temperature range and accuracy do SigmaWit loggers support?
Most models measure from -30°C to 70°C (-22°F to 158°F). Taking the WLogmp2 WiFi data logger as an example: accuracy is ±0.5°C within 20–40°C and ±1°C across the rest of the range, with an external temperature sensor on a 1 m probe. Different models offer different ranges — check each product page or contact us for the specification sheet.
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