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  1. Home
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  3. KELLER Pressure Japan 日本支社
  4. Differential Pressure Measurement in Industrial Applications - A Detailed Look at the World of Differential Pressure Measurement
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  • Jun 27, 2025
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Jun 27, 2025

Differential Pressure Measurement in Industrial Applications - A Detailed Look at the World of Differential Pressure Measurement

KELLER Pressure Japan KELLER Pressure Japan 日本支社
How do differential pressure sensors work, and how do they differ from other sensor types? Gauge pressure and absolute pressure sensors have defined reference points for measuring pressure differences (for absolute pressure: absolute vacuum; for gauge pressure: atmospheric pressure). In contrast, differential pressure sensors measure the difference between two pressures without defining a reference point. Differential pressure sensors can be constructed in various designs, one feature of KELLER Pressure's products is that there are types that can use liquid at both ports (e.g., model PD-33X). They can measure differential pressure with high resolution. There are also sensors that use two absolute pressure measurement cells to measure two pressures and calculate the differential pressure through electronic circuits (model PD-39X). This structure is particularly suitable for high-pressure applications. Typical applications of differential pressure sensors: 1. Flow measurement There are several methods for measuring flow, but one common method is differential pressure measurement through an orifice plate. 2. Level measurement of liquefied gas tanks Liquefaction reduces volume, allowing for transportation and storage. Why is differential pressure measurement suitable for this level measurement? For more details, please visit the URL below!
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Differential Pressure Measurement in Industrial Applications | KELLER Pressure

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PD-33X.png

Keller Company Differential Pressure Sensor Series 33X

High-precision differential pressure sensor with RS485 digital output - capable of liquid/liquid differential pressure measurement!

The differential pressure sensor 33X achieves an extremely high accuracy of 0.05% full scale (FS) in the temperature range of 10 to 40°C through a mathematical correction method. In addition to a digital RS485 interface, analog current or voltage outputs are also available. 【Features】 • Piezo-resistive differential pressure sensor capable of measuring liquid/liquid differential pressure • Accuracy of ±0.05 %FS in the temperature range of 10 to 40°C • Standard dual outputs of digital RS485 and analog output (Analog output options include 4–20 mA, 0–5 V, 0–10 V, and 0.1–2.5 V) • Analog output range can be changed via digital RS485 • Line pressure: up to 60MPa • Excellent long-term stability • Correction technology using a mathematical model to provide accurate pressure values

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PD-39X.png

Keller Company High-Precision Differential Pressure Sensor Series PD-39X (39X-Ei)

High-precision differential pressure sensor using two absolute pressure sensors - Excellent pressure resistance on one side!

The differential pressure sensor series PD-39X is a high-precision model that indirectly measures differential pressure using two absolute pressure sensors and boasts high pressure resistance performance. In addition to a digital output (RS485), it comes standard with two outputs: analog current or voltage output. The analog output can be freely scaled within the line pressure range based on the settings of the digital signal. There is also an intrinsically safe explosion-proof type available (PD-39X-Ei).

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Keller Company High-Precision Differential Pressure Sensor PD-33X

Keller Company High-Precision Differential Pressure Sensor PD-33X

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Keller Company High-Precision Differential Pressure Sensor PD-39X/PD-39X-Ei

Keller Company High-Precision Differential Pressure Sensor PD-39X/PD-39X-Ei

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AAEON Industrial SMARC Module equipped with ARM MediaTek Genio 700/510 【uCOM-M700/M510】

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Features: ● Equipped with ARM MediaTek Genio 700 / 510 ● Onboard LPDDR4 8GB ● HDMI 2.0 x 1, DP 1.4 x 1 ● eDP 2 lanes x 1, MIPI-DSI 4 lanes x 1 ● GbE x 1 ● USB 3.0 + 2.0 x 1, USB 2.0 x 5 ● UART x 4, GPIO x 12, MIPI CSI x 2, TPM 2.0 ● Fan-equipped heatsink, heatsink available separately ● Carrier board available separately

Oct 23, 2025

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AAEON COM Express Type 10 module equipped with Core Ultra 7 155H / 5 125H【NANOCOM-MTU】

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Features: ● Equipped with Intel Core Ultra 5 125H/7 155H ● LPDDR5 16GB onboard memory ● NVMe 128GB onboard storage ● eDP x 1, DDI x 1 ● USB 2.0 x 8, USB 3.2 Gen2 x 2 ● PCIe 4.0[x1] x 4 ● 2.5GbE x 1 ● COMe Type10 standard, size 84mm x 55mm ● Optional items ECB-920A-0001: Development carrier board NANOCOM-MTU-FAN: CPU fan NANOCOM-MTU-HSP: Heat spreader (Note: Heat dissipation is required in the enclosure)

Oct 23, 2025

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AAEON Industrial COM Express Module equipped with Intel Core Ultra series [COM-MTHC6]

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Features: ● Equipped with Intel Core Ultra 9 185H / 7 155H / 5 125H processors ● DDR5 5600MHz Dual Channel SODIMM x2 (up to 96GB) (sold separately) ● VGA switch DDI x1, LVDS colay eDP x1, DDI x2 ● USB 2.0 x8, USB 3.2 Gen 2 x4 ● PCIe [x1] x4, PCIe [x4] x1, PEG [x8] + [x4] + [x4] ● 2.5GbE x1 ● DC 9~16V input ● COM Express Type 6, 3.75 inches x 3.75 inches (95mm x 95mm)

Oct 23, 2025

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Advantages and Disadvantages of Digitizing Contract Operations from Paper to Electronic | paperlogic

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By digitizing contract operations, you can reduce many costs, including stamp duty and mailing fees. ◆ Four Benefits of Electronic Contracts - Cost reduction for printing, stamp duty, mailing fees, and original document storage - Improved business efficiency through system-based sending and stamping - Prevention of tampering with timestamps - Enhanced document searchability 【Many Benefits for the Other Party as Well!】 - Both parties can confirm that the document has not been tampered with - No worry about losing the original paper documents - Increased operational efficiency due to the absence of mailing and binding hassles - Quick contract conclusion through email or system verification ◆ Disadvantages of Electronic Contracts - Costs for implementing and operating the service - Need to ensure that business partners understand electronic transactions -----------------------------------------------------   Consult with paperlogic for electronic contract services! -----------------------------------------------------

Oct 23, 2025

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[Catalog] Glass Tube Area Flow Meter / Metal Tube Area Flow Meter (Revised Edition)

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Variable Area Flowmeters Reliable quality designed to world standards When measuring the flow of high-pressure or high-temperature liquids and gases that are not suitable for plastic, our robust "glass tube variable area flowmeter (rotameter)" allows for more accurate flow measurement. It offers a wider flow range and is suitable for various liquids and gases! Contents ■ Glass tube variable area flowmeters / Metal tube variable area flowmeter lineup ■ Custom design solutions ■ Accessories & replacement parts ■ Support for technical documentation and compliance with various regulatory requirements ■ Services and support, etc.

Oct 23, 2025

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