TESTO 400 Short Instructions

10 Technical data
20
Characteristics Measuring range Accuracy
Resolutio
n
Differential
pressure
2
-100 to +200 hPa
±(0.3 Pa + 1% of m.v.)
(0 to 25 hPa)
±(0.1 hPa + 1.5 % of m.v.)
(25.001 to 200 hPa)
0.001 hPa
Absolute
pressure
+700 to +1100 hPa
±3 hPa
0.1 hPa
1
The accuracy information applies in an adjusted, stable temperature state.
Plugging in the mains unit, charging the battery or adding digital probes can
distort this temporarily, and additional errors may occur.
2
The accuracy specification applies immediately after zeroing of the sensor. For
long-term measurements, mains operation with fully-charged battery is
recommended.
10.1 Product-specific approvals
Please find the current approvals in the attached Approval and Certification
document(s).
10.2 Contact and support
If you have any questions or need further information, please contact your
dealer or Testo Customer Service. For contact details, please visit
www.testo.com/service-contact.

TESTO 400 Specifications

General

Protection Class	IP40
Humidity Measurement Range	0 to 100 %RH
Memory	Internal memory for data storage
Connectivity	USB, Bluetooth
Power Supply	Rechargeable battery
Storage Temperature	-20 to 60 °C
Battery Life	Up to 10 hours
Measurement Parameters	CO, CO2, O2, NO, NO2, SO2, H2S, Temperature, Humidity, Differential Pressure, Flow
O2 Measurement Range	0 to 21 vol.%
SO2 Measurement Range	0 to 5000 ppm