Description
The 56-RTR503BL is the L-model of the T/RH logger 56-RTR503B — same electronics, same measuring range (0–55 °C, 10–95 %RH) via external probe, but with a large battery compartment for LS26500 C-cell lithium batteries, providing approx. 4 years of operation between battery changes.
Designed for long-term environmental monitoring where battery replacement should be minimized. The external T/RH probe 56-TR-3310 is included as standard. Measurement data is transmitted wirelessly (EU: 869.7–870 MHz) to any RTR-500B base unit at a direct line-of-sight distance of up to 150 meters.
Features
- External T/RH probe on cable (TR-3310 included)
- Measuring range 0 to +55 °C and 10 to 95 %RH
- Accuracy ±0.5 °C / ±5 %RH (at 25 °C, 50 %RH)
- Resolution 0.1 °C / 1 %RH
- Wireless range approx. 150 meters line-of-sight
- 8,000 data point memory
- Battery life approx. 4 years on LS26500 (sold separately)
- Built-in LCD and Bluetooth 4.2 BLE for configuration
Specification
| Measurement channels | Temperature 1 channel (thermistor) + Humidity 1 channel (polymer) — external, on cable |
|---|---|
| Measuring range | 0 to +55 °C / 10 to 95 %RH |
| Accuracy | ±0.5 °C / ±5 %RH (at 25 °C, 50 %RH) |
| Resolution | 0.1 °C / 1 %RH |
| Logging capacity | 8,000 data points |
| Wireless communication | EU: 869.7–870 MHz, RF power 5 mW, range approx. 150 m |
| Other interfaces | Bluetooth 4.2 BLE, optical communication |
| Protection class | IP64 on the logger unit |
| Power supply | Large battery compartment for LS26500 (NOT included) |
| Battery life | approx. 4 years |
| Dimensions | 62 × 47 × 46.5 mm |
| Weight | approx. 65 g |
| Compatible base units | 56-RTR500BC, 56-RTR500BW, 56-RTR500BM |
Included
- 56-RTR503BL logger with large battery compartment
- External T/RH sensor 56-TR-3310
- Manual set with warranty certificate
Sold separately (required for operation)
- LS26500 C-cell lithium battery
Applications
The 56-RTR503BL is designed for fixed T/RH monitoring installations where battery replacement is impractical: pharmaceutical storage, museums/archives with multi-year quality control, greenhouses, wine cellars, data centers, cold storage, and remote warehouses. For the standard model with included battery power, see 56-RTR503B.
