Dif­fer­en­tial pres­sure trans­mit­ter – HE 5409

For monitoring the differential pressure of air or other non-flammable and non-aggressive gases.


Perfect for filter monitoring

Approval for EX Zone 22

Ideal supplement for valve control HE 5731

Exact detection of differential pressures for gases

Quick commissioning due to easy mounting and easily accessible connection area




Produkt anfragen



Dif­fer­en­tial pres­sure trans­mit­ter – HE 5409 from HESCH

Dif­fer­en­tial pres­sure must be recorded and mon­i­tored when small pres­sure dif­fer­ences can have large effects.
Dif­fer­en­tial pres­sure trans­mit­ters thus per­form impor­tant tasks in plant engi­neer­ing: they not only check the con­di­tion of fil­ter sys­tems, but also mon­i­tor the vol­ume flows of ven­ti­la­tion and air-con­di­tion­ing sys­tems or mea­sure lev­els in liq­uid con­tain­ers.


The dif­fer­en­tial pres­sure trans­ducer – HE 5409 reli­ably deliv­ers exact mea­sured val­ues and is also char­ac­ter­ized by fast com­mis­sion­ing thanks to 2-wire tech­nol­ogy.


For inte­gra­tion into your risk assess­ment, the HE 5409 sup­ports you with qual­i­fied val­ues for MTBF and MTTFd.



Quick assem­bly

The hous­ing is opened and closed with­out screws thanks to hinge tech­nol­ogy. This saves time dur­ing assem­bly. To open the device, sim­ply place a flat-blade screw­driver at the des­ig­nated point on the hous­ing cover to pry open the lock­ing mech­a­nism. The hous­ing cover remains on the device due to the hinge tech­nol­ogy and does not have to be com­pletely dis­man­tled, as it can be opened up to an angle of 105°.


The mea­sur­ing ranges avail­able as stan­dard can be found under “Tech­ni­cal Data”. Spe­cial mea­sur­ing ranges are avail­able on request.




Here you will find
Dif­fer­en­tial pres­sure reg­u­la­tor

Areas of application

– ventilating and air-conditioning systems
– heating technology
– filter monitor
– flow monitoring
– building services engineering
– firing technology
– extraction systems

Technical data

HE 5409
Mess­bere­ich (mbar)0–25; 0–50; 0–100;
Max. Dif­feren­z­druckMess­bere­ich 0–25 mbar: 100 mbar
Mess­bere­ich 0–100 mbar: 750 mbar
MediumLuft, sowie trock­ene, nicht aggres­sive Gase
Grund­ge­nauigkeit± 1 % vom Endw­ert
Tem­per­atur­drift± 0,05 % / K vom Endw­ert
Hil­f­sen­ergieUb = 10…36 V DC
Analo­gaus­gang4…20 mA, 2-Leit­ertech­nik
Max. zuläs­sige BürdeRA ≤ (Ub – 9 V) / 0,02 A
Druck­an­schlussSteck­an­schluss für 6 mm
GehäuseStaub­dichtes Poly­car­bon­at­ge­häuse
Abmes­sung113 × 80 × 60 (B × H × T)
Mon­tageWand­mon­tage, Ein­baulage senkrecht
Kabelver­schraubung1 × M 16 × 1,5 N für Kabel­durchmesser von 4…8 mm
EX Logo II3D Ex tc IIIC T135° Dc

EX Logo II3G Ex nR IIC T4 Gc
Kli­ma­tis­che Umge­bungs­be­din­gun­gen
Lagerung-20° … +70° C
Trans­port-40° … +85° C
Betrieb-20° … +55° C
Rel­a­tive Luft­feuchte75 % rel. Feuchte, keine Betau­ung
Sicher­heit­stech­nis­che Kenn­zahlen
MTBF646 Jahre
MTTFd1292 Jahre
MTBFMax. 10 Jahre
Kat­e­gorie nach
EN-ISO 13849
Berech­nungsver­fahren nach EN-ISO 13849Parts-Count

Errors and omis­sions excepted


Data sheet HE 5409 – Ger­man

Data sheet HE 5409 – Pol­ish


Oper­at­ing Instruc­tions HE 5409 – Ger­man

Oper­at­ing Instruc­tions HE 5409 – Eng­lish


Dec­la­ra­tion of Con­for­mity HE 5409 – Ger­man

Dec­la­ra­tion of Con­for­mity HE 5409 – Eng­lish


Drilling tem­plate for HE 5409


EPLAN Macro – Dif­fer­en­tial pres­sure trans­mit­ter HE 5409

Part numbers

Mess­bere­ich (mbar)Artikel­num­mer
0 … 25#54092599
0 … 50#54095099
0 …100#54091299

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