Description
The 56-TR71A2 is TandD’s WiFi-enabled 2-channel temperature logger — a standalone unit that connects directly to your existing wireless network (or mobile hotspot) and automatically uploads measurement data via encrypted HTTPS to the T&D WebStorage Service cloud. No separate base unit or PC is required during operation.
The logger supports two channels for external thermistor probes on cable — the included fluoropolymer-coated probe measures -60 to +155 °C and withstands aggressive environments. The built-in Vaccine Mode (VFC/CDC-compliant) records Max/Min values based on logged data — perfect for pharmaceutical supply chains and vaccine refrigerators. Advanced WPA2-Enterprise (IEEE 802.1X with EAP-TLS/PEAP) makes the unit compatible with enterprise networks.
Features
- 2 channels for external temperature probes
- External probe measurement range: -60 to +155 °C (depending on probe)
- Internal probe measurement range (internal sensor on electronics): -40 to +110 °C
- Accuracy ±0.3 °C / ±0.5 °C depending on temperature range
- WiFi 802.11 b/g/n (2.4 GHz)
- Security: WPA-PSK, WPA2-PSK, WPA2-Enterprise (EAP-TLS, EAP-PEAP/MSCHAPv2), WPS 2.0
- HTTPS for secure data upload
- Vaccine Mode — Max/Min/ALM based on logged data (VFC/CDC-compliant)
- Normal Mode — Max/Min/ALM based on current display
- 30,000 data point memory
- 15 fixed logging intervals: 1–60 sec or 1–60 min
- 15 selectable upload intervals: 1 min to 24 hours (or manual)
- Bluetooth 4.2 BLE for configuration via T&D Thermo-app
- USB 2.0 Mini-B for PC connection (TR7 for Windows)
- LCD with Max/Min/ALM display for both channels
Specification
| Measurement channels | Temperature 2 channels (external, thermistor on cable) + 1 internal sensor (at electronics) |
|---|---|
| External measurement range | -60 to +155 °C (depending on probe) |
| Internal measurement range | -40 to +110 °C |
| Accuracy | ±0.3 °C (-20 to 80 °C), ±0.5 °C (-40 to -20 °C / 80 to 110 °C) |
| Resolution | 0.1 °C |
| Response time (90 %) | approx. 190 sec |
| Logging capacity | 30,000 data points |
| Measurement modes | Normal Mode or Vaccine Mode (VFC/CDC) |
| WiFi | IEEE 802.11 b/g/n (2.4 GHz) |
| Security | WPA-PSK / WPA2-PSK / WPA2-Enterprise (EAP-TLS, EAP-PEAP/MSCHAPv2), WPS 2.0 |
| Protocols | HTTP, HTTPS, SNTP, DHCP, DNS |
| Other interfaces | Bluetooth 4.2 BLE, USB 2.0 Mini-B |
| Power supply | 2 × AA alkaline LR6, 2 × AA Ni-MH, USB bus (5V 200 mA), AC adapter 56-AD-05A2 or 56-AD-05C2 |
| Battery life | approx. 5 days (at 1 min upload, ≥1 min logging interval) |
Applications
The 56-TR71A2 is selected for pharmaceutical validation, vaccine chains (CDC/VFC), clinical research and process monitoring with strict documentation requirements. Also suitable for dual measurements (in/out heat in systems, two zones in the same chamber). For combined T+RH, see 56-TR72A2. For high precision, see 56-TR72A2-S. For thermocouples, see 56-TR75A2. For wired Ethernet instead of WiFi, see the corresponding 56-TR-7xNW series.
