Description
The 56-TR-74UI is TandD’s 4-in-1 light and climate logger — simultaneously measures illuminance (lux), UV intensity, temperature, and humidity via two included external sensors: the light/UV sensor ISA-3151 and the T/RH sensor THA-3151. Connect directly to a PC via USB for configuration and data download.
The measurement range spans from moonlight (0.01 lx resolution) to direct summer sun (130 klx), making the logger suitable for environments ranging from museums and archives with strict light limitations to full-sun cultivation. Built-in display of cumulative light exposure (0–90 Mlxh) and cumulative UV exposure (0–62 W/cm²·h) directly on the LCD — perfect for documenting total light load on sensitive objects over time.
Features
- 4 channels: illuminance, UV intensity, temperature, and humidity
- Light range: 0.01 lx to 130 klx — moonlight to direct sunlight
- UV range: 0 to 30 mW/cm² (260–400 nm UVA/UVB)
- T/RH with included THA-3151: 0–55 °C / 10–95 %RH
- Cumulative light exposure: 0 to 90 Mlxh
- Cumulative UV exposure: 0 to 62 W/cm²·h
- Direct USB 2.0 Mini-B connection to PC
- 8,000 data point memory
- 15 fixed logging intervals: 1–60 sec or 1–60 min
- Powered by 1 × AA battery for approx. 6 months
- Front-panel buttons for manual operation
- Built-in LCD with rotation of all values + cumulative displays
Specification
| Measurement channels | Light + UV + Temperature + Humidity — 1 channel each |
|---|---|
| Light measurement range | 0 lx to 130 klx (resolution 0.01 lx) |
| UV measurement range | 0 to 30 mW/cm² (260–400 nm) |
| T/RH measurement range | 0 to +55 °C / 10 to 95 %RH |
| Light/UV accuracy | ±5 % at 25 °C, 50 %RH |
| T/RH accuracy | ±0.5 °C / ±5 %RH (at 25 °C, 50 %RH) |
| Response time (90 %) | T/RH: approx. 7 min; Light/UV: 3 sec (1 sec interval) / 6 sec (other) |
| Logging capacity | 8,000 data points |
| Cumulative light | 0 to 90 Mlxh |
| Cumulative UV | 0 to 62 W/cm²·h |
| Communication | USB 2.0 Mini-B, serial (via optional cable 56-TR-07C) |
| Power supply | 1 × AA alkaline LR6 |
| Battery life | approx. 6 months |
| Dimensions | 55 × 78 × 18 mm |
| Weight | approx. 40 g |
Included
- 56-TR-74UI logger
- 1 × AA alkaline battery
- Light/UV sensor 56-ISA-3151
- T/RH sensor 56-THA-3151
- USB Mini-B cable 56-US-15C
- Manual set with warranty certificate
Applications
The 56-TR-74UI is chosen for conservation environments and outdoor applications: museums (painting galleries, photo collections, textile archives), galleries, libraries, heritage buildings, greenhouses and solar panel installations, photo studios, light therapy rooms, and clinical phototesting. For high precision (±2.5 %RH), see 56-TR-74UI-S. For CO₂ instead of light, see 56-TR-76UI.
