Description
The 56-TR-73U is TandD’s 3-channel handheld logger that measures temperature, humidity AND atmospheric pressure simultaneously in a single unit — perfect for weather documentation, calibration measurements, and quality control where all three parameters are required at the same time.
The included TR-3100 T/RH probe provides 0–55 °C / 10–95 %RH with ±0,3 °C accuracy in the calibration range of 0–50 °C. The built-in barometer measures 750–1100 hPa with ±1,5 hPa accuracy. The logger is approved according to RTCA DO-160E Section 21 for radio frequency emission — meaning it can be carried on board flights as carry-on luggage and used during flight without interfering with avionics. Highly useful for air freight documentation of temperature-sensitive cargo.
Features
- 3 channels: temperature, humidity and atmospheric pressure
- Temp/RH with external TR-3100 probe: 0 to +55 °C / 10 to 95 %RH
- Atmospheric pressure (internal sensor): 750 to 1100 hPa
- Accuracy T: ±0,3 °C (0–50 °C) / ±0,5 °C / ±1,5 hPa
- Resolution 0,1 °C / 1 %RH / 0,1 hPa
- Direct USB 2.0 Mini-B connection to PC
- 8,000 data point memory (combined for all 3 channels)
- 15 fixed logging intervals: 1–60 sec or 1–60 min
- RTCA DO-160E Section 21 approved — can be used in the aircraft cabin
- Powered by 1 × AA battery for approx. 10 months
- Front buttons for start/stop, interval selection, display selection
Specification
| Measuring channels | Temperature 1 channel (external TR-3100) + Humidity 1 channel (external) + Atmospheric pressure 1 channel (internal) |
|---|---|
| Measuring range T (included probe) | 0 to +55 °C, optional: -40 to +110 °C |
| Measuring range RH | 10 to 95 %RH |
| Measuring range pressure | 750 to 1100 hPa |
| Accuracy | ±0.3 °C (0–50 °C, calibration) / ±5 %RH / ±1.5 hPa |
| Resolution | 0.1 °C / 1 %RH / 0.1 hPa |
| Response time (90 %) | T/RH: approx. 7 min; Pressure: 4 sec (1 sec interval) or 40 sec (≥10 sec interval) |
| Logging capacity | 8,000 data points |
| Communication | USB 2.0 Mini-B, serial (via optional cable 56-TR-07C) |
| Power supply | 1 × AA alkaline LR6 (included) |
| Battery life | approx. 10 months |
| Dimensions | 55 × 78 × 18 mm |
| Weight | approx. 40 g |
| Operating environment | -10 to +60 °C, max 90 % RH non-condensing |
| Certificates | RTCA DO-160E Section 21 (airborne radio emission) |
Included
- 56-TR-73U logger
- 1 × AA alkaline battery
- External T/RH probe 56-TR-3100
- USB Mini-B cable 56-US-15C
- Manual set with warranty certificate
Applications
The 56-TR-73U is selected for applications where atmospheric pressure is critical: air transport of temperature-sensitive products (pharmaceuticals, biochemical samples, sensitive electronic components), weather documentation, calibration tasks requiring pressure-compensated T/RH values, high-altitude measurements, dive centers, and vehicle testing centers. For simpler T/RH without pressure, see 56-TR-72NW (Ethernet) or 56-TR72A2 (WiFi).
