1. Home
  2. testo 420
0560 0420

testo 420 - Differential pressure measuring instrument

testo 420
testo 420
testo 420
testo 420
Use the testo 420 differential pressure measuring instrument to carry out simple, efficient tests on filters. You can also use the measuring instrument in conjunction with a Pitot tube to measure flow velocity and volume flow really easily in ventilation ducts.
  • Differential pressure measurement, e.g. to check filters in air conditioning and ventilation systems
  • Calculate flow velocity and volume flow using a Pitot tube
  • Handy instrument featuring a large display and user-friendly menu guidance
  • Save measurement data for analysis and documentation
The testo 420 differential pressure measuring instrument is suitable for accurate differential pressure measurement up to 120 Pa, e.g. when checking filters in HVAC systems. Flow velocity and volume flow are calculated by the testo 420. The measuring instrument can also be used for absolute pressure measurement.

Differential pressure measuring instrument with practical functions

You can use a Pitot tube and compatible connection hoses (both optional) to measure the flow velocity and volume flow in ventilation ducts. Timed and multi-point mean calculation, as well as the combination of the two, along with simple input of the duct geometry provide you with support for measurements in ducts.

The automatic zeroing ensures higher accuracy for low pressures. All measuring values are easy to read on the large display which has an illumination function.

Documenting the measurement data

Measurement data can be stored in the differential pressure measuring instrument for analyses and documentation. It's easy to manage the measurement data on the PC without any additional software, via the plug & play function.

Pressão diferencial - piezoresistiva

Faixa de medição
+0,1 a +14 m/s
-120 a +120 Pa
Exatidão
±2 % do vm + 0,5 Pa at +22 °C, 1013 hPa
Resolução
0,001 Pa
0,01 m/s
Tempo de reação t₉₀
1 s (t90)

Pressão absoluta

Faixa de medição
700 a 1100 hPa
Exatidão
±3 hPa
Resolução
0,1 hPa
Tempo de reação t₉₀
1 s

Dados técnicos gerais

Dimensões
150 x 85 x 35 mm
Temperatura de operação
-5 a +50 °C
EU-/EG-orientações
UE-diretriz 2014/30 / EU
Tipo de bateria
Manganês alcalino, mignon, tipo AA
Durabilidade
40 h
Tamanho do display
3.5"
Função de exibição
Dot matrix
Display luminoso
with illumination
Interface
Micro-USB
Memória
2 GB (interno)
Temperatura de armazenagem
-20 a +60 °C
testo 420 differential pressure measuring instrument including batteries and calibration protocol.
  • not available
Contato Delegação Portugal
Instrumentos Testo, S.A.
234 320 280
Local de produção Portugal:
Testo Portugal, Unipessoal Lda.
Zona Industrial de Albergaria-a-Velha, Arruamento G, número 2
3850-184Albergaria-a-Velha
Portugal
Contato Central Barcelona
Instrumentos Testo, S.A.
Zona Industrial, c/ B, nº 2
E-08348Cabrils
BarcelonaEspanha
+34 93 753 95 20
Contato Delegação Madrid
Instrumentos Testo, S.A.
Polígono Industrial Santa Ana, Av. de la Técnica 19, nave 1
E-28522Rivas-Vaciamadrid
MadridEspanha
+34 91 499 09 10

Atendimento ao cliente

Delegação Portugal: Segunda-feira a Sexta-feira: 9:00 a 12:30 / 14:00 a 18:30Central Barcelona: Segunda-feira a Sexta-feira: 7:00 a 12:30 / 14:00 a 17:00Delegação Madrid: Segunda-feira a sexta feira: 7:30 a 13:00 / 14:00 a 17:00

© 2026