Differential pressure transmitter

OEM Relative and diﬀerential
pressure transmitter
Type 403
Type 403 pressure transmitters sense ultra-fine changes in gas
pressure for use in air / gas ratio control systems. All materials
used are compatible with flammable gas.
When used in combination with our type 401 pressuretransmitter, the optimum air / gas ratio can be achieved.

Pressure range
0 ... 3 – 8 mbar

+ Special development for optimize of combustion mixture
in gas boilers+ With the special diaphragm geometry inherently stable due
to homogeneous manufacture+ Ideal dimensioning for high sensitivity and with long term
stability+ Excellent repeatability even in the lower pressure range(< 20 Pascal)

Pressure and flow

Huba Control Type 403 | Technical data subject to change | Edition 09/2020

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Technical overview
Pressure range
Relative and diﬀerential

0 ... 3 – 8 mbar

Operating conditions
MediumRupture pressure
Leak rate

Air, neutral and burnable gases
0 ... +70 ºC-40 ... +70 ºC
25 mbar
100 mbar short period at room temperature
200 mbar< 5 cm3/h (Air), at measuring range

Materials in contact with the medium
CaseDiaphragmSensor

Polycarbonate (PC)NBR (NBR admission for burnable gas)
Ceramic Al2O3

Electrical overview
OutputPower supplyLoad
Current consumption
Polarity reversal protection

0.5 ... 4.5 V
10.4 ... 18 VDC 1)> 15 kOhm (to GND)
< 8 mA
Mechanically protectedMedium / ambient
Storage

Temperature
Tolerable overload on one side

At nominal voltage without load

Dynamic response
Response time
Load cycle< 10 ms< 10 Hz

Protection standard
IP 00

Protection class
III

Electrical connections
3 pole connector RAST 2.5
Pressure connection
Pipe Ø 6.2 mmMounting instruction
Installation arrangement

Diaphragm horizontal (Recommend)
Diaphragm vertical (on request)

Presssure connections facing downward
Pressure connections lateral, signal approx. 13 Pa below actual pressure
Snap mounting in sheet steel (thickness 1 and 2 mm)
Mounting bracket type A / type B

Mounting
Tests / Admissions
DVGW
Gas appliance directive

CE-0085BP0459 (DVGW) acc. DIN EN 1854
2016/426/EG

WeightWithout accessories~ 45 g

Packaging
Cardboard boxes with blister pack inserts (returnable).
Ordering batches quantities / Transport volumes
PiecesVaraint1440
12 Box on euro-palette
1201 Box

Length (cm)12059

Width (cm)80
39Accuracy

Weight (kg)134
9.5

Blister (20 pcs)
72
6

Signal drift

Parameter
Tolerance zero point 2)
Tolerance full scale 2)
Resolution
Total of linearity,hysteresis and repeatability
Long term stability acc. to DIN EN 60770
TC zero point 3)
TC zero point 3)
TC sensitivity 3)

Height (cm)93
26

Unitmax.
max.

% fs
% fs
% fs

± 0.5
-1.5 /+0.5
0.1

max.

% fs
% fs
% fs/10K% fs/10K% fs/10K

± 0.3
± 1.0
± 0.2
± 0.3
± 0.1

typ.
max.
typ.

24 V

12 Vseconds1)

2/4

Power supply possible up to 28 VDC (with higher Power up drift see diagram)Pressure and flow2)

For changing diaphragm position from horizontal to vertical, approx. -0.13 mbar.

3)

TC = Temperature coefficient

Huba Control Type 403 | Technical data subject to change | Edition 09/2020

Order code selection table
Pressure range

Order number

0 ... 3 mbar
0 ... 5 mbar
0 ... 8 mbar
▲ Full scale signal at these pressure

44
4000333.
.
.

Accessories (supplied loose)

Order number

Bracket type A
Bracket type B
Special screws for fastening transmitter to bracket (2 screws per transmitter required)
Orifice for pulsed pressure
Connector with cable RAST 2.530 cm
Connector with cable RAST 2.5
110 cmConnector with cable RAST 2.5
150 cmCalibration certificate

100295100098102976100251111668101817112282104551

AMP connector 1)

Manufacture‘s Part No.
3-829868-3

Colourgrey

1-966194-3

beige

9993
58000000000for flexible wire
7 x 0.20 mm = 0.22 mm2 or
12 x 0.20 mm = 0.35 mm27 x 0.25 mm = 0.35 mm2Connector with cable
IN= red
OUT = yellow
GND = black

Dimensions in mm / Electrical connections
Bracket mounting

Typ A

Typ BConnector
RAST 2.5

Hole forPT screws K 25
Hole depth 8 mm

Direct mounting onto armature (fittings)

thickness 1 mm

thickness 2 mm
Clip clamp
Other dimensions as per «Thickness 1 mm»

1)

To be ordered separately from original manufacturer. Further information can be found in the manufacturer specification No. 114-18049.49

Pressure and flow

Huba Control Type 403 | Technical data subject to change | Edition 09/2020

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