Temperature and humidity are two of the most frequently underestimated variables in industrial operations. A two-degree drift in a cold storage room, an unnoticed humidity spike in a pharmaceutical warehouse, or moisture build-up in a grain silo can all mean rejected batches, spoiled inventory and audit findings. The TOPRIE TP2406 Temperature and Humidity Logger was developed for exactly this challenge: continuous, unattended measurement of temperature and relative humidity, delivered wirelessly to the systems that operations teams already use.

Rather than treating the logger as a single-purpose recorder, the TP2406 is designed as an IoT field device. It measures, stores, displays and transmits — and it does so for years on a single battery, across communication networks chosen by the customer.

A wide measuring range, IP66/IP68 protection and multi-network connectivity let the TP2406 serve very different environments with one hardware platform:

• Cold chain and refrigerated logistics: continuous monitoring of cold rooms, refrigerated trucks and distribution hubs, with temperature excursions transmitted in near real time instead of discovered at delivery.
• Grain storage and agriculture: silo, granary and greenhouse monitoring where humidity build-up directly drives mould, insects and weight loss.
• Pharmaceutical and food production: documented environmental conditions for GMP and HACCP compliance, with data available for audit trails.
• Warehouses and production workshops: protection of hygroscopic raw materials, electronics, paper, textiles and finished goods.
• Hazardous and explosion-proof areas: the TP2406-EX version with IP68 protection is built for chemically aggressive or flammable atmospheres where standard sensors cannot be installed.
• HVAC and ventilation systems: supply and return air monitoring for building automation and energy optimisation.
• Data centers, server rooms and laboratories: early warning of cooling failure or humidity drift before equipment is affected.

Projects rarely share the same infrastructure. The TP2406 supports 4G, WiFi, LoRa, LoRaWAN and RS485, so a single model can be deployed in a factory with WiFi coverage, a remote silo with LoRaWAN gateways, and a site without any local network using 4G SIM connectivity. There is no need to maintain several different device types or spare-part inventories.

With a 19,000mAh industrial battery and configurable wake-up modes, the device delivers 2-2.5 years of hourly uploads over 4G/WiFi and 4-5 years over LoRa/LoRaWAN. Wall mounting and IP66 sealing remove the cabling cost and maintenance visits that usually limit how densely a facility can be instrumented.

An accuracy of ±0.3°C and ±3% RH is meaningful in regulated environments: it keeps the logger within the tolerance budgets required for pharmaceutical storage and food safety documentation, and it makes trend analysis trustworthy rather than indicative.

The aluminum alloy housing and metal alloy probe resist corrosion, condensation and mechanical impact. The waterproof model carries IP66 protection; the explosion-proof TP2406-EX reaches IP68 for hazardous zones, allowing the same monitoring architecture to extend into areas where ordinary electronics are not permitted.

Because the device transmits over MQTT, TCP/IP or a documented private protocol and reports temperature, humidity, battery percentage, signal strength and SIM card information, data can be routed into an existing SCADA platform, cloud dashboard or ERP quality module. Configuration over USB or Bluetooth means commissioning can be completed on site with a laptop or phone.

The TFT LCD screen gives technicians an immediate on-site reading, shortening troubleshooting, while remote data access keeps regional managers informed without travel.

LoRaWAN deployments use a gateway for local coverage while 4G/WiFi units transmit directly. Units can be ordered from a single piece for pilot projects, with CE and RoHS certification and standard delivery within 5-8 working days. Waterproof and explosion-proof variants share one specification platform, simplifying spares planning across a mixed site.

The TP2406 Temperature and Humidity Logger is not simply a thermometer with memory. It is a field-ready monitoring node that combines laboratory-grade accuracy, multi-year battery autonomy, hazardous-area protection and open protocol integration. For operations that need environmental data they can act on — in cold rooms, silos, clean rooms, workshops or explosive-risk zones — it provides a single, consistent answer.