Mechanical pressure switch

OEM Relative and diﬀerential
pressure switch
Type 605

Type 605 pressure switches are specially developed for use in gas
fired heating systems.
There are more than 40 million switches in use worldwide. Produced on a fully automated production line.
High setting accuracy and repeatability, combined with excellent
reliability characterise a quality of switch above the industry norm.

Pressure range
20 ... 400 Pa+ Fitting of the switch – Fast mounting with snap bracket
system+ Adjusting security+ High contact strength (typically 10 cN)– Essentially less susceptibility to polution ofcontact+ Roll operation of contact surface– Less sensitive to contact polution throughself cleaning effect+ Diaphragm design / material– Better long term stability achieved though theuse of a 2 component silicon diaphragm.
– Unique trapezoid diaphragm design provides
for a better contact release and therefore amore accurate switching point

Pressure and flow

Huba Control Type 605 | Technical data subject to change | Edition 09/2020

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Technical overview
Pressure range
Relative and differential

20 ... 400 Pa 1)

Operating conditions
MediumMedium / ambient
Storage< +85 ºC
+85 ... +110 ºC

Temperature 2)
Tolerable overload on one side
Smallest turn on pressure of 20 Pa 3)
Materials in contact with the mediumSensor
Case

Air and neutral gases-30 ... +110 ºC-30 ... +110 ºC
5000 Pa
1500 Pa
Smallest switching differential 8 Pa
Silicone LSR
PC Lexan 500R 4)

Electrical overview
Switching load
Contact system
Service life

Changeover switch
Mechanically

See Nominal loading limits> 106 switching cycles

Protection standard
Not mounted
With contact safety guard
With cover, without seal
With cover and seal

IP 00
IP 30IP 54
IP 65Reproducibility
Between± 1 PaElectrical connection
AMP connector 5)

6.3 mm
4.8 mmPressure connections
Pipe
Orifice installed for damping pulsating pressure at P1, P2 (option)

Ø 6.2 mmMounting instructions
Installation arrangement

Please indicate installation arrangement
With several brackets
Fastening clip for quick mounting

Mounting
Tests / Admissions
UL
DVGW
EC type examination certificate
Low voltage directive
Gas appliance directive

MFHX2/8 or XAAK2/8
acc. to DIN EN 1854
CE-0085AP0974
2014/35/EU
2016/426/EU

WeightWithout accessories~ 60 gPackaging

300 pieces
1200 pieces (4 boxes per pallet)

Multiple packaging in cardboard

Adjustable switching differences
Switching difference adjustment only insideshaded area:

220 - 400 Pa

20 - 220 Pa

Example: Upper switching point 20 pascal,
smallest switching difference 8 pascal.

Switching point above (Pa)

Example: Upper switching point 40 pascal.
Switching difference between 9 and 30 pascal.

Switching point above (Pa)

Example: Upper switching point 220 pascal.
Switching difference between 14 and 36 pascal.

Swtching difference (Pa)

1)
4)

2/5

Higher pressures on request
Fiberglass reinforced plastic 10% GF

Pressure and flow2)
5)

Higher temperatures on request
According to DIN 46244

Switching difference (Pa)3)

Switching differential is factory-set

Huba Control Type 605 | Technical data subject to change | Edition 09/2020

Dimensions in mm / Electrical connections

1 Feeder (COM)2 NC contact
3 NO contact

Cover with / without sealing
and PT screw

Contact safety guard with PT srew
Cable exit AMP1 or AMP2

Tolerance of switching point

The principle of high contact pressure
Simplified representation of the new DPS 605 contact system. The high contact pressure
results form the optimized length ratios of LC and LD.

Contact pressure (CP)CP = DP

Diaphragm pressure (DP)

( )
LCLD

Pivot point

Switching point
upwards

LCLD
LC = Length of contact lever
LM = Length of diaphragm leverPressure and flow

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Accessories

Order number

Cover with seal and PT screw
Cover without seal and PT screw
Cover with PT screw and cable output AMP-1
Cover with PT screw and cable output AMP-2

100306100307100297 + 102981 (PT screw)100298 + 102981 (PT screw)100294100293106790100295100296106707111223112985104551Thickness of sheet metal 0.8 ... 1.1 mm
Thickness of sheet metal 1.8 ... 2.1 mm

Fastening clip
Fastening clip (with mounting holes)
Bracket type A
Bracket type B
Mounting plate
Mounting adaptor small
Mounting adaptor large
Calibration certificate (at factory set switching points)
Fastening clip
(Dimensions in mounted state)

Fastening clip
(with mounting holes)

Mounting plate

Bracket type A

Mounting adaptor small

Bracket type B

Mounting adaptor large

For screw PT40

For screw PT40

Thickness of sheet metal0.8mm

Nominal loading limits
for ACfor DC

1 = ohmic
2 = inductive (cosφ 0.7)

U (V)

4/5

Pressure and flow

1 = ohmic
2 = inductive
Can also be operated with TTL-load
U (V)Huba Control Type 605 | Technical data subject to change | Edition 09/2020

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