Description
The 56-RTR-574-S is TandD’s 4-in-1 specialty logger for demanding conservation environments — it simultaneously measures illuminance (lux), UV intensity, temperature, and humidity in a single unit, featuring the high-precision SHA-3151 sensor for T/RH, which offers a wider measuring range and better accuracy than the standard model.
Designed primarily for museums, galleries, archives, and cultural heritage institutions where the exposure of artworks, documents, and collections must be kept within strict standards (UV radiation, light dose, climate). The logger not only displays current values but also accumulates cumulative light and UV exposure over time — perfect for documenting long-term stress on sensitive objects. It detects changes in illuminance even under low-light conditions such as moonlight.
Features
- Simultaneously measures light, UV, temperature, and humidity across 4 channels
- Light measuring range: 0 to 130 klx — suitable for everything from moonlight to direct sunlight
- UV measuring range: 0 to 30 mW/cm²
- S-model: temperature -25 to +70 °C, humidity 0 to 99 %RH
- T/RH accuracy: ±0.3 °C / ±2.5 %RH (at 15–35 °C, 30–80 %RH)
- Cumulative display of light and UV exposure over time
- Wireless range of approx. 150 meters line of sight
- 8,000 data point memory (combined)
- 15 fixed logging intervals: 1–60 sec or 1–60 min
- Built-in LCD with alternating display of all 4 channels
Specification
| Measuring channels | Illuminance, UV intensity, Temperature, Humidity — 1 channel each (4 total) |
|---|---|
| Illuminance range | 0 to 130 klx |
| UV range | 0 to 30 mW/cm² |
| Temperature range | -25 to +70 °C (S model) |
| Humidity range | 0 to 99 %RH (S model) |
| Accuracy T/RH | ±0.3 °C / ±2.5 %RH (at 15–35 °C, 30–80 %RH) |
| Special function | Cumulative light and UV exposure, sensitivity down to moonlight |
| Logging capacity | 8,000 data points |
| Wireless communication | EU: 869.7–870 MHz, RF power 5 mW, range approx. 150 m |
| Power supply | Lithium battery LS14250 × 1 |
| Battery life | approx. 10 months |
| Compatible base units | 56-RTR500BC, 56-RTR500BW, 56-RTR500BM (each RTR-574 counts as 2 registrations) |
Applications
The 56-RTR-574-S is chosen for conservation-oriented environments — museums (painting galleries, photographic archives, textile collections), national archives, galleries, libraries with rare volumes, cultural heritage properties, performing arts and exhibition environments. Also usable in outdoor applications where light and UV need to be measured (greenhouses, solar panels, light therapy rooms). For CO₂ measurement instead of light/UV, see 56-RTR-576-S. For simpler T/RH logging without light/UV, see 56-RTR503B or 56-RTR507B.
