Description
The 56-TR-51I is TandD’s compact IP67 temperature logger with a built-in thermistor — a robust single-channel logger for wet, dusty, and cold environments where the sensor must withstand water and splashes. No external connections, no USB port, no buttons — just a logger in a fully sealed housing with optical data transfer.
Powered by an LS14250 lithium cell for approx. 4 years — one of the longest battery lives in the industry. For data retrieval, the communication holder 56-TR-50U2 (sold separately) is required — place the logger on the holder, connect to a PC via USB, and the data is transferred in 20 seconds.
Features
- Built-in thermistor sensor — no external connections
- Measuring range -40 to +80 °C with 0.1 °C resolution
- Accuracy ±0.3 °C (-20 to 80 °C), ±0.5 °C (-40 to -20 °C)
- IP67 rated — waterproof when submerged
- 4-year battery life on one LS14250
- 16,000 data points
- 15 fixed logging intervals (1 sec to 60 min) — at 60 min: 666 days non-stop
- Two modes: Endless (overwrites oldest data) or One Time (stops when full)
- Built-in LCD displaying temperature and battery status
- Optical communication via 56-TR-50U2 (sold separately)
- Alarm LED blinks upon threshold exceedance
Specification
| Measuring channel | Temperature 1 channel — thermistor (internal) |
|---|---|
| Measuring range | -40 to +80 °C |
| Accuracy | Average ±0.3 °C (-20 to 80 °C), ±0.5 °C (-40 to -20 °C) |
| Resolution | 0.1 °C |
| Response time (90 %) | approx. 35 minutes |
| Logging capacity | 16,000 data points |
| Logging mode | Endless or One Time |
| Communication | Optical (requires 56-TR-50U2 USB holder) |
| Protection class | IP67 — watertight when submerged |
| Power supply | Lithium battery LS14250 × 1 (included) |
| Battery life | approx. 4 years |
| Dimensions | 62 × 47 × 19 mm |
Included accessories
- 56-TR-51I logger
- 1 × Lithium battery LS14250
- Manual set with warranty certificate
- NOTE: 56-TR-50U2 holder required for PC connection (sold separately)
Applications
The 56-TR-51I is designed for humid and cold industrial environments where the logger must withstand splashes or rinsing: food display cases, freezers, cold liquids, water-carrying processes, and dusty warehouses. Its 4-year battery life makes it ideal for long-term fixed installations. For an external probe on a cable, see the 56-TR-52I. For modern alternatives with Bluetooth, see the 56-TR41A.
