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DMK 331 Ceramic Diaphragm Industrial Pressure Transmitter

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DMK331 Plastic Port

The DMK331 ceramic diaphragm pressure transmitter is for general purpose applications requiring a pressure range between 0.4 and 600 bar, including vacuum ranges and absolute range from 0.6 bar.

This pressure transmitter can be supplied with a PVDF process connector so that it can be used to measure the pressure of acids and other corrosive chemicals. There is also the option for a Oxygen service version for pressure ranges up to 25 bar with a FKM seal, or 15 bar with a EPDM seal.

Contents

  • Product Applications
    • Calcium Chloride
    • Saline & Sulphuric Acid Solutions
    • Oxygen clean 1 bar g
    • Acidic water pressure up to 300 psi
    • Ethylene & Acetylene gases up to 1 bar absolute
  • Product Help
    • 3500 mbar range for Oxygen service
    • Sulfuric acid H2SO4 50% conc & 50°C max up to 2 bar
    • Acetic & Hydrobromic acid
    • Max media & ATEX Tamb temperature
    • 250-X102-1-5-100-F00-1-1-2-000
    • 250-X102-1-5-100-300-1-1-2-000
  • Related Documents
    • Specification data sheet

Product Applications

Calcium Chloride

A DMK331 built with a ceramic diaphragm, PVDF process connection and FKM seals is compatible with a calcium chloride solution.

  • SKU ID: s1-dmk331-0008
  • Part No: 251-1002-1S-5-TA0-H00-1-B-2-000
  • Pressure Range: 0 – 10 bar absolute
  • Output: Intrinsic Safety, SIL2, 4 – 20mA / 2 wire
  • Electrical Connection: IP66 cable outlet with 2m of PVC cable
  • Process Connection: G 1/2″ DIN 3852 open port
  • Process Connection Material: PVDF
  • Seal Material: FKM
  • Diaphragm Material: Aluminium Oxide
  • Accuracy: 0.5% FS
  • IP Rating: 65
  • Thermal Errors (TZS & TSS): 0.02% FSO / °C
  • Media Operating Temperature Range: -30 to +60°C
  • Electronics Housing Operating Temperature: -40 to +85°C

Saline & Sulphuric Acid Solutions

Measure the pressure of water pipes containing salts and sulphuric acid solutions. Reverse Osmosis is used to remove salts from water, and sulphuric acid is used as a dosing agent to remove scaling, caused by the salt, from the membrane.

  • SKU ID: s1-dmk331-0007
  • Part No: 250-4001-1-5-850-H00-1-B-2-000
  • Pressure Range: 0 – 4 bar g
  • Output: 4 – 20mA / 2 wire
  • Supply Voltage: 12 – 36V dc
  • Electrical Connection: Field housing stainless steel IP67
  • Process Connection: G 1/2″ DIN 3852 open port
  • Process Connection Material: PVDF
  • Seal Material: FKM
  • Diaphragm Material: Aluminium Oxide
  • Accuracy: 0.5% FS
  • IP Rating: 65
  • Thermal Errors (TZS & TSS): ±0.02% FSO / °C
  • Media Operating Temperature Range: -30 to +60°C
  • Electronics Housing Operating Temperature: -40 to +85°C

Oxygen clean 1 bar g

Oxygen service intrinsically safe pressure transmitter for measuring pressure of Oxygen gas from 0 to 1 bar gauge.

This transmitter is suitable for use on Oxygen because it has a dry sensing cell which excludes any hydrocarbons based fluids which would otherwise be a flammable/explosion risk if the cell was damaged and leaked fluid into the Oxygen.

The internal surfaces of the process connection have been cleaned to very high standard to remove traces of oil & grease left behind during the manufacturing process.

DMK331 Oxygen Clean Pressure Transmitter

  • SKU ID: s1-dmk331-0003
  • Part No: 250-1001-E-5-100-N40-1-1-2-007
  • Pressure Range: 1 bar gauge
  • Accuracy: 0.5% FS
  • Output Signal: 4-20mA, ATEX / IECEx IS, (2 wire)
  • Supply Voltage: 10-28Vdc
  • Electrical Connection: DIN43650A plug and socket
  • Pressure Connection: 1/4 NPT male
  • Media Compatibility: Stainless steel 1.4404 (316L) port, Ceramic diaphragm, FKM O ring seals
  • Optional Extras: Oxygen clean

Acidic water pressure up to 300 psi

Pressure sensor for use on acidic water from underground mines up to a pressure of 300 psi. This sensor has a 4-20mA output and a 1/2 inch thread for installing on a pipe.

  • SKU ID: s1-dmk331-0004
  • Part No: 250-P300-1-5-100-H00-1-B-2-000
  • Pressure Range: 0 – 300 Psi G
  • Output: 4 – 20mA / 2 wire
  • Supply Voltage: 12 – 36V dc
  • Electrical Connection: Large Plug & Socket to ISO 4400
  • Process Connection: G 1/2″ DIN 3852 open port
  • Process Connection Material: PVDF
  • Seal Material: FKM
  • Diaphragm Material: Aluminium Oxide
  • Accuracy: 0.5% FS
  • IP Rating: 65
  • Thermal Errors (TZS & TSS): ±0.02% FSO / °C
  • Media Operating Temperature Range: -30 to +60°C
  • Electronics Housing Operating Temperature: -40 to +85°C

Ethylene & Acetylene gases up to 1 bar absolute

Intrinsically safe pressure sensor for use on ethylene and acetylene gas with a measurement range of 0 to 1 bar absolute and a 4 to 20 milliamp transmitter signal.

Ethylene & Acetylene gas pressure transmitter

  • SKU ID: s1-dmk331-0005
  • Part No: 251-1001-E-5-100-300-1-1-2-000
  • Pressure Range: 0 – 1 Bar Abs
  • Output: 4 – 20mA / 2-wire
  • Supply Voltage: 14 – 28 V dc
  • Electrical Connection: Large Plug & Socket to ISO 4400
  • Process Connection: G1/4″ male DIN 3852
  • Process Connection Material: Stainless Steel 1.4571 (316Ti)
  • Seal Material: FKM
  • Diaphragm Material: Aluminium Oxide
  • Accuracy: 0.5% FS
  • IP Rating: 65
  • Thermal Errors (TZS & TSS): ±0.02% FSO / °C
  • Media Temperature: -25 to +135°C
  • Operating Temperature: -25 to +85°C
  • Special Options: None
  • Approvals: ATEX (II 1 G Eex ia IIC T4)

Product Help

3500 mbar range for Oxygen service

I’m looking for a pencil pressure transmitter to measure up to 3500 mbar with a 1/2 inch thread size.  The pressure transmitter must also be suitable for Oxygen service.

Below is a suggested spec which is Oxygen clean and with a pressure range scaled to 0-3500 mbar g.

  • SKU ID: s1-dmk331-0006
  • Part No: 250-3501-E-5-TA0-H00-1-1-2-007
  • Pressure Range: 3500 mbar gauge
  • Accuracy: 0.5% FS
  • Output Signal: 4-20mA, ATEX / IECEx IS, (2 wire)
  • Supply Voltage: 10-28Vdc
  • Electrical Connection:IP67 seal with 2m of cable
  • Pressure Connection: G1/2 DIN3852 open port male
  • Media Compatibility: Stainless steel 1.4404 (316L) port, Ceramic diaphragm, FKM O ring seals
  • Optional Extras: Oxygen clean

Sulfuric acid H2SO4 50% conc & 50°C max up to 2 bar

We are looking for pressure transducers that are capable for working with sulfuric acid (H2SO4) with a concentration which is always below 50% and a temperature always below 50°C. The other specification requirements are a nominal pressure range of 0 to 2 bar gauge and an output signal of 4-20mA.

The DMK331 can be manufactured with a PVDF process connections to make it compatible with acids along with the Ceramic diaphragm and FKM o ring seals.

  • SKU ID: s1-dmk331-0001
  • Part No: 250-2001-1-5-100-H001-B-2-000
  • Pressure Range: 2 bar gauge
  • Accuracy: 0.5% FS
  • Output Signal: 4-20mA (2 wire)
  • Supply Voltage: 8-32Vdc
  • Electrical Connection: DIN43650A plug and socket
  • Pressure Connection: G1/2 DIN3852 male open port
  • Media Compatibility: PVDF port, Ceramic diaphragm, FKM O ring seals
  • Media Operating Temperature Range: -30 to +60°C
  • Electronics Housing Operating Temperature: -40 to +85°C

Acetic & Hydrobromic acid

I have a requirement for a 10 bar pressure transmitter for use on corrosive process fluid which is a mixture of  Acetic acid, Hydrobromic acid & water.

We would suggest a DMK331 with a PVDF process connection and EPDM seals for compatibility with the acid solution you will be measuring.

  • SKU ID: s1-dmk331-0002
  • Part No: 250-1002-1-5-100-H00-3-B-2-000
  • Pressure Range: 10 bar gauge
  • Accuracy: 0.5% FS
  • Output Signal: 4-20mA (2 wire)
  • Supply Voltage: 8-32Vdc
  • Electrical Connection: DIN43650A plug and socket
  • Pressure Connection: G1/2 DIN3852 male open port
  • Media Compatibility: PVDF port, Ceramic diaphragm, EPDM O ring seals
  • Media Operating Temperature Range: -30 to +60°C
  • Electronics Housing Operating Temperature: -40 to +85°C

Max media & ATEX Tamb temperature

Is the DMK331 ATEX rated up to 85 °C? The maximum temperature limit stated on the data sheet says 125 °C but could you confirm the level at which the ATEX rating fails.

The DMK311 maximum media temperature rating is 125°C, The maximum ATEX ambient temperature rating (Tamb) is 85 degC for the surrounding environment.

DMK331 temperature specs

250-X102-1-5-100-F00-1-1-2-000

What is the product configuration for a DMK 331 with the part number 250-X102-1-5-100-F00-1-1-2-000?

  • SKU ID: s1-dmk331-6-16255
  • Part No: 250-X102-1-5-100-F00-1-1-2-000
  • Pressure Range: -1 to 0 bar gauge
  • Accuracy: 0.5% FS
  • Output Signal: 4-20mA (2 wire)
  • Electrical Connection: DIN43650A plug and socket
  • Pressure Connection: G1/2 male DIN3852 with semi-flush diaphragm
  • Media Compatibility: Stainless steel 1.4404 (316L) port, Ceramic diaphragm, FKM O ring seals

250-X102-1-5-100-300-1-1-2-000

What is the product configuration for a DMK 331 with the part number 250-X102-1-5-100-300-1-1-2-000?

  • SKU ID: s1-dmk331-0009
  • Part No: 250-X102-1-5-100-300-1-1-2-000
  • Pressure Range: -1 to 0 bar gauge
  • Accuracy: 0.5% FS
  • Output Signal: 4-20mA (2 wire)
  • Electrical Connection: DIN43650A plug and socket
  • Pressure Connection: G1/4 male DIN3852
  • Media Compatibility: Stainless steel 1.4404 (316L) port, Ceramic diaphragm, FKM O ring seals

Related Documents

Specification data sheet

  • DMK331 pdf product data sheet

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