Engineered for critical gas applications, this sensor features an all-welded construction and a thick stainless steel diaphragm to prevent helium and hydrogen permeation.
The DMP 335 utilizes an all-welded stainless steel construction that eliminates internal O-rings or elastomeric seals, providing a robust barrier against the molecular migration often encountered in high-vacuum or high-purity gas systems.
This design is specifically engineered to address the limitations of oil-filled, thin-diaphragm sensors, where small-atom gases like helium or hydrogen can permeate the isolation membrane over time, leading to signal drift or media contamination. By utilizing a relatively thick, monolithic sensing element, the DMP 335 maintains structural integrity and measurement stability even under rigorous pressure and temperature cycling.
Each unit undergoes a stringent helium leak detection process using specialized mass spectrometry equipment capable of identifying leak rates as low as 10-6 mbar·l/sec. This validation is critical for process engineers managing semiconductor manufacturing tools, analytical laboratory gas lines, or aerospace ground support equipment where maintaining a hermetic seal is paramount.
Furthermore, the wetted components undergo a comprehensive degreasing and cleaning protocol suitable for oxygen service, ensuring that no hydrocarbons or particulate matter are introduced into sensitive process streams. This makes the series an ideal selection for installation in gas distribution manifolds, hydrogen storage testing rigs, and UHP (Ultra High Purity) gas delivery systems where even trace contaminants could compromise the integrity of the application.
The combination of a high-integrity metallic seal and documented helium leak verification provides the necessary assurance for calibration technicians and research engineers working with volatile or high-value gases.
DMP 335 Leak Tested & Cleaned All Welded Stainless Steel Pressure Sensor
- SKU ID: s1-dmp335-1-31792
- Pressure Range: 0-100
- Units: psi
- Range Type: Gauge (atm to +P)
- Output Signal: 4-20mA
- Electrical Connection: Male plug M12x1 (4-pin) / metal
- Process Connection: 1/4 NPT male
- Optional Extras: Helium leakage test certificates (10-6 mbar·l/sec), test passes and evaluated leakage rate, cleaned and degreased for oxygen service