Must-Ask Questions for ET-A Pressure Transmitter Customization: If These 4 Parameters Are Not Confirmed, Beware of Exceeding Your Budget by 50%!

When customizing an ET-A pressure transmitter, technical evaluators often overlook key parameters, causing the budget to exceed by 50%! For customized diffusion silicon liquid and gas pressure sensors, special attention should be paid to these 4 core parameters: measurement range, media compatibility, output signal, and process connection method. This article will provide you with a detailed analysis of these key indicators to help you make precise selections and avoid unnecessary cost waste.

1. Measurement Range: The Core Indicator Determining Measurement Accuracy and Cost

Measurement range is the primary parameter in pressure transmitter selection. The range of ET-A series diffusion silicon pressure sensors covers from 0-1kPa to 0-100MPa, but blindly choosing a high range will lead to two problems: first, measurement accuracy decreases. For example, using a 100kPa sensor under a 10kPa range may enlarge the error by 10 times; second, costs increase sharply. For every increase of one range level, material costs and calibration expenses rise by an average of 15%-20%.

It is recommended to adopt the "1.5 times safety factor" principle: if the actual maximum working pressure is 0.6MPa, selecting a Domestic Weighing Sensor YHT-320C Cantilever Beam Weighing Sensor Hopper Scale Shear Beam Force Sensor with a 1MPa range is sufficient to meet the requirement. This principle also applies to the selection of models such as PN-M2 and YBS-S100.

2. Media Compatibility: The Key to Preventing Sensor Corrosion Failure

Media compatibility directly affects the service life of the ET-A pressure transmitter. The parts of the diffusion silicon sensor that come into contact with the medium include the diaphragm, sealing ring, and process connection fitting:

• Corrosive media: such as chlorine and acid-base solutions require a Hastelloy diaphragm
• Viscous media: such as petroleum residue and heavy oil are recommended to use a flush diaphragm structure
• High-temperature media: above 120℃ requires a heat sink or capillary tube

We once encountered a case where a chemical enterprise failed to specify that the medium contained H2S, resulting in a standard 316L stainless steel sensor being corroded through within three months. Special medium adaptation solutions may increase costs by 5%-30%, but they are far more economical than frequent replacement.

3. Output Signal: The Technical Link for System Integration

The ET-A pressure transmitter supports multiple output signals, and incorrect selection may cause the control system to fail to recognize it:

Special reminder: if digital communication functions such as HART protocol are required, this must be clearly specified when ordering, as later modification costs can be as high as 40% of the original price.

4. Process Connection Method: The Decisive Factor for Installation Compatibility

The process connection method directly affects installation costs. Common options include:

1. Threaded connection: G1/2", NPT1/2", etc., suitable for conventional models such as PMP-PMP317
2. Flange connection: DN50 PN16 flange, used for high-pressure pipelines
3. Sanitary clamp: 3A standard, dedicated to the pharmaceutical and food industries

A wastewater treatment plant once failed to confirm the pipeline interface standard, resulting in a mismatch in the thread specification of the purchased HB-S model and an additional modification cost of 2000 yuan/unit. It is recommended to provide on-site interface photos or dimension drawings for confirmation.

5. Extended Considerations: Environmental Factors and Certification Requirements

In addition to the above 4 core parameters, the following factors also affect the customization cost of the ET-A pressure transmitter:

• Explosion-proof certification: ATEX/Ex d IIC T6 certification increases cost by 20%-35%
• Protection rating: IP68 housing is 10%-15% more expensive than IP65
• Temperature compensation: wide temperature range compensation from -40℃~150℃ requires special treatment

Unlike the standard parameters indicated in the MBC-1 pressure transmitter manual, customized products require all special requirements to be clearly specified in the contract.

Professional Recommendations and Action Guide

Based on our experience serving 300+ enterprises, we recommend following the process below for ET-A pressure transmitter customization:

1. Fill in the "Operating Condition Survey Form" to clarify all technical parameters
2. Obtain configuration comparison lists from 3 suppliers
3. Request test reports equivalent to MS-MS132

As a national high-tech enterprise, Xi'an Shenghongchuang Instrumentation Co., Ltd. can provide free selection consultation and 72-hour sample testing services. Contact our technical team now to obtain a customized pressure sensor solution and avoid 50% hidden cost waste!