High frequency response pressure sensor with a better than 0.5 millisecond response time and internal digital signal conditioning that samples readings at a rate of 10 kilohertz.
The DMP320 precision pressure transmitter is engineered for dynamic pressure measurement applications requiring exceptional speed and accuracy. Featuring an ultra-fast response time of <= 0.5 msec and a 10 kHz internal sampling rate, the unit effectively captures rapid pressure transients, peaks, and dynamic pressure curves across nominal ranges from -1…0 bar gauge up to 0…600 bar gauge or absolute. High measurement accuracy of <= +-0.10% FSO according to IEC 61298-2 is maintained across demanding thermal environments via active digital error compensation. Built with robust 316L stainless steel wetted components and housed in a compact stainless steel enclosure, the DMP320 delivers reliable long-term stability and high mechanical endurance in demanding plant engineering and industrial process monitoring applications.
Product Parameters
- Pressure Range: 0 to 0.1 up to 600 bar g, abs, compound and negative gauge
- Accuracy: 0.1% FS for ranges 0.25 bar and above, 0.25% for ranges below 0.25 bar
- Output Signal: 3 wire 4-20mA or 0.1-10Vdc
- Response Time: ≤ 0.5 msec with internal sampling rate of 10 kHz
- Electrical Connections: DIN plug, Binder, M12, IP67/68 cable gland, field housing
- Pressure Connectors: 1/4 BSP male DIN3852 or EN837, 1/2 BSP male DIN3852, EN837, DIN3852 open port, 1/4 or 1/2 NPT male
- Media Compatibility: SS316L diaphragm and process connection with FKM or EPDM seals.
- Media Operating Temperature Range: -40 to +125°C
- Ambient Operating Temperature Range: -40…85°C
- Weight: ~200 g
- Dimensions: 26.5 mm diameter
Product Description
The DMP320 is a high precision pressure sensor for use on test systems where the technician is interested in monitoring and recording very dynamic changes in pressure to a high accuracy.
The DMP320 precision pressure transmitter utilizes digital signal processing electronics operating at an internal sampling rate of 10 kHz. This rapid signal acquisition architecture enables active compensation for sensor-specific deviations, including non-linearity, hysteresis, and thermal offset or span errors. Over the compensated temperature range of -20…80°C, the transmitter maintains a tight thermal tolerance band of 0.2% FSO with an average thermal coefficient of +-0.02% FSO / 10 K. Its long-term signal stability rating of 0.1% FSO per year ensures consistent measurement repeatability over prolonged operational cycles.
Engineered for industrial durability, the DMP320 features media-wetted components constructed from high-grade stainless steel 1.4404 (316L) for the pressure port and 1.4435 (316L) for the flush measuring diaphragm. Flexible sealing options include standard FKM or optional EPDM, allowing broad compatibility with various liquid and gaseous process fluids. The transmitter housing is constructed from stainless steel 1.4404 (316L), with an optional stainless steel 1.4301 (304) compact field housing for field environments. Designed to withstand harsh operating environments, the device resists mechanical vibration up to 20 g RMS (10…2000 Hz) and mechanical shocks up to 500 g with a 1 msec half-sine duration.
Designed for straightforward control system integration, the DMP320 offers standard 3-wire signal outputs of 0.1…10 V voltage or 4…20 mA current. Power requirements are met by an auxiliary supply voltage range of 14…30 VDC. Electrical interface configurations include ISO 4400 connectors, Binder series 723 5-pin plugs, M12x1 4-pin metal connectors, compact field housings, and shielded cable outlets with optional ventilation tubes for atmospheric reference tracking. Comprehensive internal electrical safeguards include permanent short-circuit protection and reverse polarity protection.
Product Applications
- Plant and machine engineering requiring high-speed pressure dynamic tracking.
- Energy sector applications including power generation and fluid distribution monitoring.
- Hydraulic circuit analysis for capturing rapid pressure surges, peaks, and hits.
- Test bench and research laboratory pressure measurement requiring fast 10 kHz data sampling.
- Industrial process control loops requiring high accuracy and fast output updates.
Product Specifying Guide
Select the nominal pressure range and reference type
Determine the process operational pressure and reference condition required for your measuring application. Gauge pressure options span from -1…0 bar up to 0…600 bar, while absolute pressure options are available from 0.4…0.60 bar up to 0…600 bar. Verify that anticipated process pressure spikes do not exceed the specified overpressure limits (e.g., 40 bar overpressure for a 10 bar nominal range) or burst pressure ratings.
Choose the required output signal format
Select the analogue electrical output format that matches your control interface or data acquisition hardware. Available choices include a 3-wire voltage output of 0.1…10 VDC or a 3-wire current output of 4…20 mA. Both output configurations operate on a supply voltage range of 14…30 VDC.
Determine the process connection thread
Identify the mechanical process connection required for secure mounting into your pipe or manifold. Standard process thread options include G1/4″ DIN 3852, G1/2″ DIN 3852, G1/4″ EN 837, G1/2″ EN 837, 1/4″ NPT, 1/2″ NPT, and a G1/2″ open pressure port version for pressures <= 40 bar.
Select appropriate seal materials
Match the elastomeric sealing ring material to the chemical characteristics and temperature profile of your process fluid. Standard FKM seals provide broad chemical compatibility for process temperatures up to 125°C, while EPDM seals are available as an option for compatible media.
Select the electrical connector and IP protection class
Choose an electrical termination option based on installation conditions and required ingress protection. Available options include an ISO 4400 connector (IP65), Binder series 723 5-pin connector (IP67), M12x1 4-pin metal plug (IP67), compact field housing (IP67), or a cable outlet with an integrated ventilation tube (IP68) for atmospheric reference pressure tracking.
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Installation & Operation Guide
Mechanical mounting and process seal verification
Prior to mounting, verify that the pressure port thread and mating receptacle are clean and undamaged. Always perform mechanical installation when the system is completely depressurized and de-energized. For DIN 3852 threaded connections, confirm that the elastomeric O-ring is undamaged and properly seated in the designated groove without applying additional sealing material like PTFE tape or hemp. Screw the unit in by hand before tightening with an open-end wrench applied strictly to the wrench flats.
Apply correct tightening torques
Tighten the mechanical process fitting using an appropriate open-end wrench without exceeding permissible torque limits for the specific thread type. Specified tightening torques for metal wrench flats include approx. 5 Nm for G1/4″ DIN 3852, approx. 10 Nm for G1/2″ DIN 3852, approx. 20 Nm for G1/4″ EN 837, approx. 50 Nm for G1/2″ EN 837, approx. 30 Nm for 1/4″ NPT, and approx. 70 Nm for 1/2″ NPT. Never apply wrench torque directly to the transmitter housing to avoid internal component damage or zero-point calibration shifts.
Electrical wiring and pin assignment
Wire the transmitter using a shielded, twisted multicore cable according to the pin assignment table on the product label. Connect the positive supply wire to Supply+, negative supply to Supply-, and signal line to Signal+ for 3-wire current or voltage operation. For cable outlet options with an integrated ventilation tube, ensure the protective PTFE filter element at the cable end remains undamaged and terminates in a dry junction box. Observe minimum cable bending radii during routing (8-fold cable diameter for unvented cable static installation; 10-fold for vented cable).
System commissioning and functional check
Following mechanical and electrical setup, energize the power supply within the specified 14…30 VDC range and gradually pressurize the line. Verify output signals at atmospheric pressure to confirm zero baseline values. Note that the microcontroller-based digital processing unit evaluates measured pressure values continuously with high precision. Perform a visual leak check at process sealing surfaces prior to operational commissioning.
Routine maintenance and cleaning procedures
Perform routine inspections of the housing, process fitting, and electrical cabling for signs of wear, corrosion, or process media accumulation. Clean the external stainless steel housing as required using a soft cloth dampened with a non-aggressive cleaning solution. Never insert pointed mechanical tools or direct compressed air streams against the sensitive measuring diaphragm to prevent permanent diaphragm deformation.