The CS81 intrinsically safe low-pressure transducer from Core Sensors is a high-strength sensor designed for use in low-pressure class I, division 1 intrinsically safe environments. Available with pressure ranges from 1 PSI up to 49 PSI with an all welded stainless steel construction and customisable configurations. The CS81 offers a choice of electrical outputs and various wetted materials. This sensor series has an operating temperature range of -40°C to +85°C, a media temperature range of -40°C to +125°C and an accuracy of ≤±0.25% BFSL.

The CS81 Intrinsically Safe Low-Pressure Transducer is certified by CSA to operate safely in Class I, Division 1 Intrinsically Safe rated locations when used with an approved current limiting barrier. The CS81 features a configurable design, allowing Core Sensors to tailor the transducer to your application’s operating requirements. The CS81 is offered in a low power configuration, capable of operating from an unregulated power supply of 3-5VDC and consuming 3mA or less of current.

• Intrinsically safe low-pressure transducer
• Pressure ranges available from 1 PSI up to 49 PSI
• Accuracy of ≤±0.25% BFSL (≤±0.5% BFSL 2 PSI & below) *
• Stability of ≤±0.25% of FS (1 year)
• Pressure cycles of 100 million
• Overpressure of 2x minimum
• Burst pressure of 5x or 245 PSI (whichever is less)
• Electrical output options of 4-20mA, 1-5V, 1-6V, 10mV/V, 0.5-4.5V ratiometric or 0.5-2.5V non-ratiometric
• Temperature range −40°C to +80°C
• Media temperature range of -40°C to +125°C
• Wetted materials available of 17-4ph, 316L SS, Hastelloy C276 ** and Inconel 718 **
• All welded stainless steel construction for a minimum IP65 rating ***
• Contact us for customisable options

* Accuracy includes non-linearity, hysteresis and non-repeatability
** Special order item
*** IP Rating applies when the electrical connector is attached with the appropriate ingress protection and is dependent on the electrical termination selected. Contact us for more information.

Approvals for the Core CS81 series include:

• CSA Class I, Division 1 groups C, D T4
• Class I, Zone 0 AEx ia IIB T4 Ga (Ex ia IIB T4 Ga)
• ABS (American bureau of shipping)
• CE

Typical applications for the CS81 intrinsically safe low-pressure transducer series include:

• Natural gas compression
• Oil exploration
• Process control

For details on the entity parameters of this part, please see page 4 of the datasheet linked above.

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Caution must be taken when installing and operating the CS80, CS81, CS82 and CS84 in known Class I, Division 1, Groups A,B,C,D hazardous locations. Any misuse or improper installation may impair the equipment’s intended use and/or protection ratings. Thoroughly read and understand the operating instructions prior to installation. Call us on +44 (0) 1342 330 470 if you are unsure about any of the precautions or instructions or require other details on this or any other core sensor components.

Core Sensors design and manufacture high-quality sensors for measuring pressure and temperature properties for industrial and hazardous applications worldwide. Core offers solutions for industrial, submersible, differential and hazardous applications in both standard and custom packaging. In-house design and manufacturing capabilities along with strategic manufacturing partners allow Core to create solutions to some of the most complex sensor requirements. Please visit https://core-sensors.com for more information.