Best CS Instruments FA 510/515

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Categories: Dew Point, Sensor Tags: CS Instruments, Dew Point, Sensor

Description

CS Instruments FA 510/515

CS Instruments FA 510/515 In addition to the previously common 4…20 mA analog output the new generation of dew point sensors have a digital RS 485 interface (Modbus-RTU). All values e. g. dew point, temperature, and absolute humidity … which are measured and calculated by the dew point sensor can be retrieved via the Modbus protocol.

Compared with the previous models the sensors and evaluation electronics have been improved once again, especially the integrated temperature compensation. This means Increased accuracy at different ambient temperatures and an improved resolution of the sensor signal. Like the previous models, the new dew point sensors have excellent long-term stability and show reliable measured values. The sensor element is insensitive to condensation and due to the serial sintered cap made of stainless steel, it is protected against direct contact with soiled particles.

Specifications

Parameter	Specification
Measuring Ranges	Desiccant Version: $-80text{ to }+20text{ }^circtext{Ctd}$ Refrigeration Version: $-20text{ to }+50text{ }^circtext{Ctd}$
Accuracy	$pm 1text{ }^circtext{Ctd}$ (at $0text{ to }+20text{ }^circtext{Ctd}$ ) $pm 2text{ }^circtext{Ctd}$ (at $-70text{ to }-20text{ }^circtext{Ctd}$ )
Operating Pressure	$-1text{ to }50text{ bar}$ standard (High-pressure options up to $350text{ or }500text{ bar}$ )
Process Connection	G 1/2″ male thread (ISO 228/1) or UNF 5/8″-18 thread
Output Signals	FA 510: $4text{--}20text{ mA}$ (4-wire) + Modbus-RTU (RS-485) FA 515: $4text{--}20text{ mA}$ (2-wire loop-powered)
Power Supply	$24text{ V DC}$ (10 to 30 V DC range)
Enclosure Rating	IP65 (Zinc alloy / stainless steel IP65 housing with M12 connector)
Special Variants	ATEX-certified EX options available for hazardous explosive gas zones

Features

Long-Term Stability & Condensation Immunity: Utilizes a proven, polymer-based capacitive humidity sensor element that recovers rapidly after direct exposure to liquid condensate without losing calibration accuracy.
Modbus Diagnostic Evaluation (FA 510): Over RS-485, engineers can continuously poll pressure dew point, relative humidity ( $% text{RH}$ ), temperature ( $^circtext{C}$ ), raw sensor signals, and service intervals.
Modbus Service Software: Parameters such as scaling ranges ( $4text{--}20text{ mA}$ span), Modbus slave IDs, and engineering units can be reconfigured in the field using a USB service adapter and CS Instruments software.
Modular Measuring Chambers: Compatible with standard quick-coupling sampling cell blocks (16 bar, 350 bar, or stainless steel high-purity cells) for quick installation under active pipe pressure.

Applications

Desiccant & Refrigeration Dryers: Serving as the core sensing element for complete monitoring packages like the CS Instruments DS 52-Set.
Medical & Breathing Air Systems: Ensuring compliance with ISO 8573-1 Class 1 through Class 3 purity standards.
Industrial Gas Lines: Monitoring dew point in nitrogen ( $text{N}_2$ ), argon ( $text{Ar}$ ), carbon dioxide ( $text{CO}_2$ ), and compressed oxygen loops.