BD SENSORS DMP 333 High Pressure Transmitter

BD SENSORS DMP 333 High Pressure Industrial Pressure Transmitter

In high-pressure applications such as hydraulic systems, machine tools, injection molding machines, test benches, and mobile hydraulics, the long-term stability, impact resistance, and high overload capacity of pressure measurement are crucial. The DMP 333 industrial pressure transmitter launched by BD | SENSORS is designed to withstand high static and dynamic pressure loads. It uses stainless steel sensors and provides a nominal pressure range from 0... 100 bar to 0... 600 bar, with excellent resistance to pressure peaks. This article will provide a comprehensive and in-depth technical analysis of the transmitter from the aspects of product positioning, technical specifications, performance accuracy, environmental adaptability, explosion-proof certification, electrical connections, and selection points.

Product positioning and core advantages

DMP 333 is an industrial pressure transmitter specifically designed for high-pressure conditions, with a focus on responding to common rapid pressure changes, positive and negative pressure peaks, and long-term continuous loads in hydraulic systems. The transmitter adopts a modular concept, allowing the combination of different stainless steel sensors and electronic modules, and is equipped with multiple electrical and mechanical interface versions, forming a rich product line that almost meets the requirements of all hydraulic applications.

The core advantages include:

Excellent long-term stability, maintained even under high-speed dynamic pressure loads.

Not sensitive to peak pressure, with extremely high overpressure capability.

Optional intrinsically safe explosion-proof version (Ex ia), suitable for gas and dust environments.

Optional SIL 2 version, compliant with IEC 61508/IEC 61511 functional safety standards.

The highest accuracy can reach 0.1% FSO (full-scale output).

Nominal pressure and overload capacity

DMP 333 provides gauge or absolute pressure measurement, with the following nominal pressure range:

Nominal pressure [bar] 100 160 250 400 600

Overvoltage capability [bar] 210 600 1000 1000 1000

Blasting pressure ≥ [bar] 1000 1000 1250 1250 1800

Overpressure capability: refers to the maximum pressure that a transmitter can withstand without permanent drift or damage. For a range of 100 bar, the overpressure is 210 bar; The overpressure in the range of 250 bar and above reaches 1000 bar, far exceeding the nominal value.

Burst pressure: refers to the ultimate pressure value at which the transmitter housing or sensor physically ruptures. The burst pressure with a range of 600 bar can reach up to 1800 bar, demonstrating an extremely high safety margin.

This feature makes DMP 333 very suitable for transient impact pressure that may occur in hydraulic systems, such as hydraulic valve switching, end of cylinder stroke, and other scenarios.

Output signal and power supply

The transmitter provides multiple output signal options to adapt to different control system interfaces:

Standard (2-wire system):

4…20 mA

Supply voltage V_SS=8... 32 V DC (SIL version is 14... 28 V DC)

Intrinsic safety explosion-proof version (2-wire system):

4…20 mA

Supply voltage V_SS=10... 28 V DC (SIL version is 14... 28 V DC)

Optional 3-wire system:

0... 20 mA or 0... 10 V

Supply voltage V_SS=14... 30 V DC

Allowable load:

2-wire current output: maximum load resistance R_max=(V_SS - V_SS-min)/0.02 A

3-wire current output: maximum load of 240 Ω

3-wire voltage output: minimum load of 10 k Ω

Performance accuracy and impact quantity

Accuracy is defined according to the IEC 61298-2 standard, using the limit point adjustment method (including nonlinearity, hysteresis, and repeatability). Provide three levels of accuracy:

Accuracy level standard option 1 option 2

Maximum error ≤± 0.35% FSO ≤± 0.25% FSO ≤± 0.10% FSO

Impact Quantity:

Power supply impact: 0.05% FSO/10 V

Load impact: 0.05% FSO/k Ω

Long term stability:

Under reference conditions, ≤± 0.1% FSO/year

Response time:

2-wire system: ≤ 10 milliseconds

3-wire system: ≤ 3 milliseconds

Temperature characteristics and allowable range

Thermal effect (zero and range):

Tolerance zone: ≤± 0.75% FSO

Compensation range: 0... 70 ° C

Allowable temperature:

Medium temperature: -40... 125 ° C

Electronic components/ambient temperature: -40... 85 ° C

Storage temperature: -40... 100 ° C

The wide temperature range allows DMP 333 to be applied in various environments such as outdoor, cold storage, and high-temperature hydraulic oil.

Mechanical stability and materials

Mechanical stability (tested according to DIN EN 60068-2):

Vibration: 20 g RMS/10... 2000 Hz

Shock: 500 g/1 ms half sine wave

Material of liquid receiving components:

Pressure interface: Stainless steel 1.4404 (316L)

Diaphragm: Stainless steel 1.4435 (316L)

Sealing element: standard FKM (fluororubber); Optional EPDM (suitable for nominal pressure ≤ 160 bar); Other seals can be provided as needed

Shell material:

Standard: Stainless steel 1.4404 (316L)

Optional compact on-site shell: stainless steel 1.4301 (304)

Cable gland: M12x1.5, brass nickel plated (clamping range 2... 8 mm)

Electrical protection and electromagnetic compatibility