Monitor ambient light exposure along with temperature, humidity, shock and tilt with single use, rechargeable and fixed installation light data logger models. Tempmate GS2, GM2 and Cobalt X offer GSM global connectivity, LTE 4G and LoRaWAN wireless connectivity respectively for cloud integration, real time alerts and easy reporting.
A light data logger is an electronic device that features a light sensor that measures the ambient light exposure during cold chain shipments and storage. It logs how much light a shipment or storage area has been exposed to (and for how long), which helps detect if a package was opened, exposed to sunlight, or mishandled during transit or storage, useful for light-sensitive goods like pharmaceuticals or vaccines.
Lisaline Asia is the authorised supplier of light data logger models like Tempmate GM2, Tempmate GS2 and Cobalt X. Alongside temperature and humidity, these feature a light sensor for monitoring light exposure throughout storage and shipment.
Tempmate GM2 and GS2 also measure shock, tilt and location for multi-parameter shipment monitoring, with worldwide GSM connectivity and LTE 4G connectivity for real time monitoring from anywhere in the world.
Cobalt X monitors dry contact, pressure, CO2 along with temperature and humidity. It extends light monitoring to fixed storage locations like cold rooms, warehouses and labs, supporting up to 4 wired or wireless sensors with LoRaWAN and Bluetooth connectivity for real time cloud integration.
Single use light data logger with global GSM connectivity and LTE 4G connectivity. These monitor temperature, humidity, shock, tilt, location. The built-in light sensor monitors ambient light exposure.
Multi-use rechargeable light data logger with global GSM connectivity and LTE 4G connectivity. The data logger has higher memory capacity with 50,000 readings under default settings. It measures temperature, humidity, shock, tilt, location. The built in sensor monitors ambient light exposure.
Fixed installation light data logger with LoRaWAN and Bluetooth wireless connectivity. The data logger supports up to 4 wired or wireless sensors simultaneously. It measures temperature, humidity, CO2, differential pressure, dry contact, light. The built in sensor monitors ambient light exposure in cold rooms, labs and storage facilities.
Light Data Logger Devices with global GSM or LoRaWAN connectivity, cloud integration, real time alerts and easy reporting designed to provide a clear proof of ambient light exposure to your sensitive items at regular intervals over a period of time.
The user starts the logger, which powers on the light sensor (along with temperature, humidity, shock, and tilt sensors) and pulls down the configuration from the cloud once a connection is established.
The device measures light intensity at the configured interval (default every 10 minutes), capturing exposure data throughout transit. Each light reading is timestamped and stored in internal memory alongside temperature and humidity values.
The light data logger device runs on its internal battery throughout the journey, with the GS2's single-use battery designed to support continuous operation for up to 120 days, while the rechargeable GM2 can be topped up via mini-USB between uses without affecting its total runtime.
At the set upload interval (default every 240 minutes) the logger transmits data via GSM/4G to the tempmate-Cloud; if no connection is available, it stores data internally and uploads once reconnected.
If light levels exceed the configured limits at any point, the system immediately sends alarm notifications through SMS or email, allowing those managing the shipment to respond quickly to a potential breach.
Users can log into the tempmate-Cloud platform to view and evaluate the full exposure history, and download detailed PDF and CSV reports for record-keeping, quality assurance, or sharing with stakeholders.
Many drugs, especially biologics, vaccines, certain antibiotics, vitamins and hormone based products, contain molecules that are chemically unstable when exposed to light particularly UV and visible light in the blue-violet range. Exposure to light over prolonged periods can break chemical bonds, trigger oxidation or cause isomerization of the active pharmaceutical ingredient. This can reduce potency and cause degradation.
Unlike temperature excursions which sometimes produce visible signs like cloudiness, separation, freezing, light induced degradation frequently has no visible indicator. A vial or blister pack can look completely normal while the drug inside has lost significant potency. This makes monitoring essential, because without a logged record, there’s no way to know exposure occurred or to quantify how much.
Regulatory bodies such as the FDA, EMA, and WHO require that drug products be stored and transported according to the conditions validated during stability testing, which often specify “protect from light” on the label. Good Distribution Practice (GDP) guidelines extend this requirement through the entire supply chain, not just storage at the pharmacy or warehouse. If a shipment can’t demonstrate it stayed within validated light exposure limits, the batch may need to be quarantined, retested, or destroyed, which is costly and can cause supply shortages.
Cold chain shipments often involve packaging that’s opened and closed multiple times (customs inspections, transfers between vehicles, cold storage facility handoffs), each exposing the product to ambient light along with temperature fluctuations. Light and temperature stresses can compound each other, sometimes accelerating degradation reactions beyond what either factor would cause alone.
Monitoring light exposure is therefore a critical part of pharmaceutical and cold chain logistics, and a light data logger is the most reliable tool for the job. By creating a timestamped record of exactly when and how long a shipment was exposed to light, it allows investigators to pinpoint precisely where in the supply chain a breach occurred, whether that’s a poorly sealed container, an extended customs delay with packaging left open, or improper handling during warehouse storage. This level of traceability is invaluable not only for root-cause investigations but also for fairly assigning liability between carriers, distributors, and manufacturers when a shipment fails to meet quality standards.
Since 1998, Lisaline Asia has been leading cold chain monitoring innovation in India. We made a landmark achievement of introducing the world’s first miniaturised Vaccine Vial Monitor (VVM) technology to monitor temperature exposure of vials for the Polio Eradication program in India. Over 25 years later, we continue to lead with trusted cold chain monitoring solutions for the pharmaceutical, logistics, food, and life sciences sectors .
As the official supplier of globally recognised brands, including Zebra Technologies, Dickson, Tempmate, Hemokool, and the manufacturer of our own Made in India product, Degrite S, we bring you the best of both international quality standards and local expertise. Choosing a licensed supplier like Lisaline Asia means you get direct manufacturer support, expert guidance in selecting the right product for your needs, and access to premium quality cold chain monitoring solutions backed by end-to-end technical services
Lisaline Asia supports the complete setup of Cobalt X data loggers, from installation to ongoing configuration. Our team handles site assessment, mounting, and sensor pairing with Atlas and Emerald, followed by commissioning on the OCEAView platform, including alarm thresholds, read intervals and user access. Ongoing support covers calibration scheduling, maintenance and troubleshooting, keeping your installation audit ready at all times.
Reach out to our team today and discover how Lisaline Asia’s licensed distributor expertise, certified products, and end-to-end after-sales support can safeguard your cold chain and keep you audit-ready at all times.
Lisaline Asia is the official supplier of Dickson, Tempmate and Zebra Data Loggers in India. Getting the products from an official supplier ensures that you receive genuine and authentic products with proper labelling, certification and documentation. Every data logger you receive is sourced directly from the manufacturer. The device’s sensors, firmware, and calibration are exactly as the manufacturer intended critical when your logger is responsible for monitoring life-saving pharmaceuticals or vaccines.
Comprehensive after-sales support, including calibration, validation, mapping, and 24/7 online support, all backed by an ISO 17025 certified in-house calibration laboratory and a WHO PQS-certified product validation and testing laboratory.
All three light data logger models, Tempmate GS2, Tempmate GM2 and Cobalt X, have strong regulatory compliance and reliability. Tempmate GS2 and GM2 hold certifications including EN 12830, FCC, CE, and RoHS, along with RTC DO-160 compliance for air transport, ensuring they meet international standards for cold chain and pharmaceutical logistics. Cobalt X is built for fixed installation compliance, supporting FDA 21 CFR Part 11, GxP and CE standards, with calibration backed by an ISO/IEC 17025 accredited facility, making it a reliable choice for regulated storage environments like labs, pharmacies and cold rooms.
We're here for you! Whether you have inquiries about our light data logger devices or need assistance, our team is ready to help.
Light exposure monitoring is the ability of a data logger to detect and record changes in ambient light levels around a shipment or storage location. This is important for products that are light sensitive such as pharmaceuticals, biologics and vaccines where unwanted light exposure can affect potency or efficacy. Tempmate GS2, Tempmate GM2 and Cobalt X, all supplied officially by Lisaline Asia in India, include a light sensor that tracks light levels alongside other environmental parameters, giving a complete picture of the conditions a product has been exposed to during transit or storage.
Package opening detection uses the light sensor inside the light data logger device to identify sudden spikes in ambient light exposure. Light exposure typically occurs when a sealed box, container or package is opened. Since the inside of a closed shipment is normally dark, any abrupt increase in light readings can indicate that the package has been opened, either intentionally or due to tampering. With Tempmate GS2 and GM2, this light data is logged with a timestamp and can trigger real-time alerts on the tempmate Cloud, helping businesses identify exactly when and where a cold chain package was accessed during its journey. Cobalt X, being a fixed installation device, is used differently, it monitors light exposure in cold rooms, labs and storage facilities, helping detect unwanted light entering a controlled environment.
Yes, a light data logger measures both the intensity and duration of light exposure, not just whether light was detected. Tempmate GS2 and GM2 record light levels in lux at regular intervals, building a timeline of exposure throughout the shipment. Cobalt X also measures light intensity as one of its supported physical parameters, alongside temperature, humidity, CO2 and pressure, at a configurable read interval set through the OCEAView platform. This means users can see not only if a product was exposed to light, but how bright the exposure was and for how long, which is useful for assessing whether the exposure could have impacted product quality.
Tempmate GS2 and GM2 are each equipped with a single built-in ambient light sensor, integrated into the device housing to continuously monitor light intensity alongside temperature, humidity, shock and tilt. Cobalt X supports up to 4 wired or wireless sensor channels simultaneously, and a light sensor can be included as one of those channels alongside other parameters like temperature, humidity, CO2 or dry contact. So while GS2 and GM2 carry one fixed onboard light sensor each, Cobalt X gives you the flexibility to combine light monitoring with additional external sensors on the same unit.
Tempmate GS2 and GM2 use a built-in ambient light sensor that continuously measures light intensity in lux, recording readings at the same measurement interval set for temperature and humidity, commonly every 10 minutes by default, though configurable on the tempmate Cloud. The recorded light values typically range from 0 to 10,000 lux, allowing the devices to detect everything from subtle ambient light changes to sudden, sharp increases such as a package being opened. Cobalt X measures light intensity at a read interval configurable from 1 to 816 minutes through the OCEAView platform, and stores each reading in internal memory before syncing to the cloud. This combination of continuous measurement, timestamping, and cloud syncing allows users to reconstruct a full light-exposure history, whether for a shipment or a fixed storage location.
Light data from Tempmate GS2 and GM2 is available in real time, as long as the device has GSM/4G connectivity, with readings transmitted to the tempmate Cloud at the configured upload interval. Cobalt X works similarly but over a different network, it transmits light data via LoRaWAN or Bluetooth Low Energy to a nearby gateway, which then forwards it to the OCEAView cloud platform. For all three devices, if connectivity is temporarily lost, readings are stored in internal memory and synced to the cloud once the connection is restored.
Light sensor readings are taken as part of the same measurement cycle as temperature and humidity, so they do not significantly add to power consumption beyond the device’s standard logging interval. This holds true across Tempmate GS2, GM2 and Cobalt X. Battery life is primarily influenced by the configured logging and upload intervals, network connectivity conditions, and for Cobalt X, whether it’s running on battery or AC power, rather than by the light sensor itself.
Yes. For Tempmate GS2 and GM2, light readings are logged with both a timestamp and location data, so you can correlate spikes in light exposure with specific points in the shipment’s journey, whether that’s loading, a customs inspection, transit, or final delivery. For Cobalt X, since it’s installed at a fixed location like a cold room or lab, light exposure data instead helps pinpoint exactly when a storage area was exposed to light, useful for identifying incidents like a door left open or a light left on during a compliance audit.
Tempmate GS2, Tempmate GM2 and Cobalt X are some of the best light data logger devices you should check out. In India you can source them from Lisaline Asia, the authorised supplier of Tempmate and Dickson data loggers. These devices offer wireless connectivity options, cloud integration with real time alerts, multi-parameter monitoring, easy reporting and regulatory compliance, covering both shipment tracking and fixed facility monitoring needs. You can contact our team to discuss your requirements and we will get back to you shortly.
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