Data sheet
Intrinsically safe pressure transmitter
MBS 4201, MBS 4251, MBS 4701 and MBS 4751
The intrinsically safe pressure transmitter program is designed for use in hazardous environments and offers a reliable pressure measurement, even in harsh applications with severe medium influences like cavitation, liquid hammer or pressure peaks.
The MBS 4201 and MBS 4251 are Ex ia IIC T6...T4 explosion protected according to the ATEX directive 94/9/EC whereas the MBS 4701 and MBS 4751 are Ex ia IIC T4 explosion protected. Both series come with 4 – 20 mA output signal, absolute or gauge (relative) versions, measuring ranges from 0 – 1 to 0 – 600 bar, zero point and span adjustment, plug connection and a wide range of pressure connections.
Excellent vibration stability, robust construction, and a high degree of EMC/EMI protection equip the pressure transmitter to meet the most stringent industrial requirements.
Features |
y In compliance with ATEX directive 94/9/EC: |
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- Ex ia IIC T6...T4 (MBS 42xx series) |
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- Ex ia IIC T4 (MBS 47xx series) |
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y Applicable in potentially explosive |
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atmosphere: |
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Zone 0, Zone 1, Zone 2 (gases and vapour) |
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y Enslosure and wetted parts of acid-resistant |
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stainless steel (AISI 316L) |
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y Pressure ranges in relative (gauge) or absolute |
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from 0 up to 600 bar |
yMarine approved
yA wide range of pressure connections
yTemperature compensated and laser calibrated
yMBS 4251 and MBS 4751 with integrated pulse snubber for protection against cavitation and liquid hammering
yMBS 4701 and MBS 4751 zero and span adjustment
y Output signal: 4 – 20 mA
Approvals |
MBS 4201 and MBS 4251: |
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Lloyds Register of Shipping, LR |
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Bureau Veritas, BV |
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American Bureau of Shipping ABS |
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Det Norske Veritas, DNV |
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(Expired September 2020) |
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© Danfoss | DCS (im) | 2020.10 |
AI244686442908en-000301 | 1 |
Data sheet | Intrinsically safe pressure transmitter, MBS 4201, MBS 4251, MBS 4701 and MBS 4751
Application and media conditions for MBS 4251 and MBS 4751
Pulse-snubber
Application
Cavitation, liquid hammer and pressure peaks may occur in hydraulic systems with changes in flow velocity, e.g. fast closing of a valve or pump starts and stops.
The problem may occur on the inlet and outlet side, even at rather low operating pressures.
Media condition
Clogging of the nozzle may occour in liquids containing particles. Mounting the transmitter in an upright position minimizes the risk of clogging, because the flow in the nozzle is restricted to the start-up period when the dead volume behind the nozzle orifice is relatively big (0.3 mm). The media viscosity has only little effect on the response time. Even at a viscosities up to 100 cSt, the response time will not exceed 4 ms.
Ordering standard versions MBS 4701
Plug: Pg 9 (EN 175301-803-A) Output: 4 – 20 mA
Pressure connection: G ½ A (EN 837)
MBS 4751
with pulse snubber
Type no. |
Measuring range |
Code number |
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Pe 1) [bar] |
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MBS 4701-1011-A1AB08 |
0 – 1 |
060G4303 |
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MBS 4701-1211-A1AB08 |
0 – 1.6 |
060G4300 |
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MBS 4701-1411-A1AB08 |
0 – 2.5 |
060G4304 |
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MBS 4701-1611-A1AB08 |
0 – 4 |
060G4305 |
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MBS 4701-1811-A1AB08 |
0 – 6 |
060G4306 |
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MBS 4701-2011-A1AB08 |
0 – 10 |
060G4307 |
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MBS 4701-2211-A1AB08 |
0 – 16 |
060G4301 |
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MBS 4701-2411-A1AB08 |
0 – 25 |
060G4308 |
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MBS 4701-2611-A1AB08 |
0 – 40 |
060G4309 |
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MBS 4701-2811-A1AB08 |
0 – 60 |
060G4302 |
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Type no. |
Measuring range |
Code number |
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Pe 1) [bar] |
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MBS 4751-3211-A1AB08 |
0 – 160 |
060G4311 |
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MBS 4751-3411-A1AB08 |
0 – 250 |
060G4312 |
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MBS 4751-3611-A1AB08 |
0 – 400 |
060G4313 |
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MBS 4751-3811-A1AB08 |
0 – 600 |
060G4314 |
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1) Relative / gauge
2 | AI244686442908en-000301 |
© Danfoss | DCS (im) | 2020.10 |
Data sheet | Intrinsically safe pressure transmitter, MBS 4201, MBS 4251, MBS 4701 and MBS 4751
Technical data |
Performance (EN 60770) |
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Standard version |
With zero point and |
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span adjustment |
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MBS type |
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MBS 4201 |
MBS 4251 |
MBS 4701 |
MBS 4751 |
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with pulse |
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with pulse |
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snubber |
snubber |
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Accuracy (incl. non-linearity, hysteresis and repeatability) |
± 1% FS |
± 1% FS |
± 0.5% FS |
± 0.5% FS |
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Non-linearity BFSL (conformity) |
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≤ ± 0.2% FS |
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Hysteresis and repeatability |
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≤ ± 0.1% FS |
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Thermal error band (compensated temperature range) |
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≤ ± 1% FS |
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Response time |
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Liquids with viscosity < 100 cSt |
< 4 ms |
< 4 ms |
< 4 ms |
< 4 ms |
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Air and gases |
< 4 ms |
< 35 ms |
< 4 ms |
< 35 ms |
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Overload pressure (static) |
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6 × FS (max. 1500 bar) |
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Burst pressure |
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> 6 × FS (max. 2000 bar) |
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Durability, P: 10 – 90% FS |
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> 3 × 106 cycles |
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0 – 1 to 0 – 10 bar mearsuring range |
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-5 – 20 % FS |
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Zero point adjustment |
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0 – 16 to 0 – 40 bar measuring range |
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-5 – 10% FS |
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0 – 60 to 0 – 600 bar measuring range |
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-2.5 – 2.5% FS |
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Span adjustment |
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0 – 1 to 0 – 600 bar measuring range |
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-5 – 5% FS |
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Electrical specifications
Nom. output signal (short curcuit protected) |
4 – 20 mA |
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Supply voltage, UB (polarity protected) |
10 |
– 28 V DC |
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Supply voltage dependency |
≤ ± 0.05% FS / 10 V |
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Current limitation (linear output signal up to 1.5 × rated range) |
30 |
– 35 mA |
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Load [RL] (load connected to 0 V) |
RL |
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UB - 10 V |
[Ω] |
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0.02 A |
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Environmental conditions
Sensor temperature range |
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See page 6 |
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Media temperature range |
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115 - (0.35 x ambient |
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temp.) |
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Ambient temperature range (depending on electrical connection) |
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See page 6 |
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Compensated temperature range |
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0 – 100 °C |
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Transport temperature range |
Plug version / cable version |
-50 – 100 °C / -30 – 80 °C |
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EMC - Emission |
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EN 61000-6-3 |
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Electrostatic discharge |
Air mode |
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8 kV |
EN 61000-6-2 |
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Contact mode |
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4 kV |
EN 61000-6-2 |
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EMC Immunity |
RF |
Field |
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10 V/m, 26 MHz – 1 GHz |
EN 61000-6-2 |
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Conducted |
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10 Vrms , 150 kHz – 30 MHz |
EN 61000-6-2 1) |
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Transient |
Burst |
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4 kV (CM), Clamp |
EN 61000-6-2 |
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Surge |
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1 kV (CM, DM) Rg = 42 Ω |
EN 61000-6-2 |
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Insulation resistance |
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> 100 MΩ at 100 V |
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Vibration stability |
Sinusoidal |
20 g, 25 Hz – 2 kHz |
IEC 60068-2-6 |
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Random |
7.5 grms, 5 Hz – 1 kHz |
IEC 60068-2-64 |
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Shock resistance |
Shock |
500 g / 1ms |
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IEC 60068-2-27 |
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Free fall |
1 m |
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IEC 60068-2-32 |
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Enclosure (depending on electrical connection) |
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See page 6 |
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1) In the frequency range of 150 kHz – 3 MHz the error is > 1% FS |
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© Danfoss | DCS (im) | 2020.10 |
AI244686442908en-000301 | 3 |
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