Description
testo 400 – Universal Measuring Instrument for Indoor Climate Monitoring
Order No.: 0560 0400
Registered in the State System for Ensuring the Uniformity of Measurements of the Republic of Kazakhstan
27.12.2021 under No. KZ.02.01.01360-2021
Valid until 27.12.2026
Technical Data
Temperature Measurement (NTC Sensor)
| Measuring range | -40 … +150 °C |
| Accuracy | ±0.2 °C ±1 digit (-25 … +74.9 °C) ±0.4 °C ±1 digit (-40 … -25.1 °C) ±0.4 °C ±1 digit (+75 … +99.9 °C) ±0.5 % of measured value ±1 digit (remaining range) |
| Resolution | 0.1 °C |
Temperature Measurement (Thermocouple Type K (NiCr-Ni))
| Measuring range | -200 … +1370 °C |
| Accuracy | ±(0.3 °C + 0.1 % of measured value) ±1 digit |
| Resolution | 0.1 °C |
Differential Pressure Measurement (Built-in Piezoresistive Sensor)
| Measuring range | -100 … +200 hPa |
| Accuracy | ±(0.3 Pa + 1 % of measured value) ±1 digit (0 … 25 hPa) ±(0.1 hPa + 1.5 % of measured value) ±1 digit (25.001 … 200 hPa) |
| Resolution | 0.001 hPa |
Absolute Pressure Measurement (Built-in Sensor and External Probe)
| Measuring range | 700 … 1100 hPa |
| Accuracy | ±3 hPa |
| Resolution | 0.1 hPa |
General Technical Data
| Weight | 510 g (instrument) |
| Dimensions | 210 x 95 x 39 mm (LxWxH) |
| Operating temperature | -5 … +45 °C |
| Housing | Plastic |
| Protection class | IP40 |
| Connectable probes | 4 x digital Bluetooth® probes or testo Smart Probe; 2 x digital probes with fixed cable or NTC temperature probe with fixed cable (via Testo Universal Connector – TUC); 2 x TC type K temperature probes with fixed cable |
| Product color | Black / Orange |
| Camera image size | Main camera: 8.0 MP; Front camera: 5.0 MP |
| Battery life | Approx. 10 hours continuous operation |
| Display type | 5.0″ touch display, HD 1280*720 pixels, IPS (160k) |
| Power supply | Rechargeable lithium-ion battery (5550 mAh) |
| Interface | Bluetooth®; USB; WLAN |
| Memory | 2 GB; 1,000,000 measurement values |
| Storage temperature | -20 … +60 °C |
