Series 251 - Wet/Wet Differential Pressure Transmitter

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Series 251 - Wet/Wet Differential Pressure Transmitter

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Series 251 - Wet/Wet Differential Pressure Transmitter Specification

Sensor Type
Wet/Wet Differential Pressure Transmitter

Display
Analog & Digital (Optional)

Outer Size
85 mm Dia.

Grade
Industrial

Thread
1/4 NPT (Male)

Bourdon Tube
Stainless Steel

Seal Material
Buna-N

Material
Die cast aluminium

Dial Material
Aluminium

Pointer Material
Aluminium

Processing Type
Calibrated before dispatch

Diameter
85 mm

Glass Size
65 mm Diameter

Mount Type
Wall / Pipe Mount

Scale Range
0-10 to 0-4000 mbar (Various Ranges)

Accuracy
1.0% F.S.

Finishing
Matte/Satin Finish

Measure Pressure Of
Air, Gases, Liquids (Non-corrosive)

Accessories
Mounting Bracket, Bolts, Manual

Series 251 - Wet/Wet Differential Pressure Transmitter Trade Information

Payment Terms
Cash on Delivery (COD), Cash Advance (CA), Cash Against Delivery (CAD), Cash in Advance (CID)

Main Export Market(s)
Asia

Main Domestic Market
Himachal Pradesh, Pondicherry, Nagaland, South India, North India, East India, West India, Andaman and Nicobar Islands, Assam, Arunachal Pradesh, Bihar, Chandigarh, Goa, Jammu and Kashmir, Jharkhand, Karnataka, Maharashtra, Mizoram, Meghalaya, Manipur, Punjab, Rajasthan, Sikkim, Tamil Nadu, Telangana, Tripura, West Bengal, Uttarakhand, Daman and Diu, Dadra and Nagar Haveli, Lakshadweep, Haryana, Gujarat, Delhi, Uttar Pradesh, Madhya Pradesh, Andhra Pradesh, Kerala, Central India, Odisha, Chhattisgarh, All India

About Series 251 - Wet/Wet Differential Pressure Transmitter

Series 251 - Wet/Wet Differential Pressure Transmitter

0.25% Accuracy

316 Stainless Steel construction

1000 PSI working pressure

5:1 Turn down

Certificate of Calibration

The Series 251 wet/wet differential pressure transmitter utilizes a double diaphragm sensor technology that outperforms standard double sensor products in accuracy, reliability and static operating pressure. This differential pressure sensing technology offers 0.25% accuracy with static operating pressures up to 1000 PSI. The Series 251 features 316 stainless steel construction designed to meet NEMA 4X (IP 65) standards. The transmitter also offers exceptional field flexibility with a 5:1 turn down and comes standard with a certificate of calibration.

Model Number Range

251-01 0 - 5 PSI ( 34.5 kPa )

251-02 0 - 10 PSI ( 68.9 kPa )

251-03 0 - 15 PSI ( 103 kPa )

251-04 0 - 30 PSI ( 206.8 kPa )

251-05 0 - 50 PSI ( 344.7 kPa )

251-06 0 - 100 PSI ( 689.5 kPa )

251-07 0 - 150 PSI ( 1034 kPa )

251-08 0 - 300 PSI ( 2068 kPa )

*Other ranges available upon request.

Versatile Differential Pressure Measurement

Engineered for wet-to-wet applications, the Series 251 transmitter caters to diverse industrial needs. Its robust construction, configurable scale range, and stainless steel wetted parts ensure accurate, long-term performance in both gaseous and liquid environments. The matte/satin finished enclosure also provides aesthetic value and protective durability.

Reliable Performance and Speed

Minimizing lag in process control, the transmitter delivers precise pressure readings with a rapid response time of under 100 milliseconds. The 1.0% full-scale accuracy, combined with thorough pre-dispatch calibration, supports dependable integration into any process system, ensuring safe and efficient operations.

Easy Installation and Maintenance

Installation is simplified by the mounting bracket, clear manual, and a choice of wall or pipe mount. Zero and span can be conveniently adjusted onsite for application flexibility. The IP65 rating ensures the transmitter stands up to dust and water exposure, suiting tough industrial environments.

FAQs of Series 251 - Wet/Wet Differential Pressure Transmitter:

Q: How does the Series 251 transmitter ensure accurate differential pressure reading in wet-to-wet applications?

A: The Series 251 uses a wet/wet differential pressure sensor encased in a stainless steel bourdon tube and die-cast aluminium body. It is calibrated before dispatch and features adjustable zero and span for fine-tuning onsite, ensuring high accuracy (1.0% F.S.) even in fluid-rich environments.

Q: What process does installation of this transmitter involve?

A: Installation consists of mounting the transmitter on a wall or pipe using supplied brackets and bolts, connecting process lines via 1/4 NPT male threads, wiring through terminal block or conduit, and finally, setting the zero and span adjustments as needed, guided by the included manual.

Q: Where is this transmitter typically used?

A: This transmitter is widely used in industrial settings where monitoring differential pressure of air, gases, or non-corrosive liquids is essential, such as HVAC systems, filtration, and process automation, particularly in environments requiring IP65 protection and optional explosion-proofing.

Q: What are the main benefits of the Series 251 IP65-rated design?

A: The IP65 rating protects the device from dust ingress and direct water jets, making the transmitter suitable for installation in harsh, dusty, or moist industrial locations, thereby enhancing its reliability and operational life.

Q: When is it necessary to choose the explosion-proof option?

A: The explosion-proof variant should be selected if the transmitter is to be installed in hazardous or classified areas where ignitable gases or dust may be present, ensuring compliance with safety regulations.

Q: How is output signal transmitted and integrated with control systems?

A: The transmitter provides a 420 mA output using a 2-wire connection, which is industry-standard for integration with PLCs, DCS, or remote monitoring systems. They are powered by a 12-36 V DC supply.

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