Description

CS Instruments FA 550 – Dew Point Sensor

CS Instruments FA 550 – Dew Point Sensor The FA 550 is ideally suited for outdoor dew point measurement and reliably determines dew points even under harsh industrial conditions.

CS Instruments FA 550 is a rugged, heavy-duty dew point sensor housed in an IP67 die-cast aluminum enclosure designed for harsh outdoor installations and demanding industrial environments.

Positioned above the compact FA 500 series, the FA 550 features a weatherproof field-mount housing with optional integrated display and optical keys, making it ideal for monitoring compressed air systems, desiccant dryers, and industrial gas lines in exposed or washdown areas.

Core Operational Functions

Integrated Alarm Switching: Onboard relay contact (up to $60\text{ V DC}, 0.5\text{ A}$ triggers local warning beacons, horns, or compressor shutdown interlocks when moisture exceeds configured limits.
Dual Output Architecture: Transmits an analog 4–20 mA current loop (2-wire or 4-wire configuration) alongside an RS-485 Modbus-RTU interface for continuous remote reporting.
On-Head Display & Keypad (Optional): Integrated graphic screen with optical touch buttons allows field configuration, threshold adjustment, and diagnostic evaluation through a sealed glass window.

Specifications

Parameter	Specification
Measuring Ranges	Option 1: $-80text{ to }+20text{ }^circtext{Ctd}$ (Adsorption / Desiccant dryers) Option 2: $-20text{ to }+50text{ }^circtext{Ctd}$ (Refrigeration dryers)
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
Outputs	Scalable $4text{--}20text{ mA}$ , RS-485 Modbus-RTU, and 1× Alarm Relay
Power Supply	$24text{ V DC}$ $18text{--}30text{ V DC}$ , max $5text{ W}$ )
Enclosure Rating	IP67 robust die-cast aluminum housing
Operating Temp	-20°C to +70°C

Features

Condensation Immunity: Capable of withstanding saturated air ( $100%text{ RH}$ ) without calibration drift, sensor degradation, or permanent damage.
Particulate Filter Protection: Stainless steel sintered cap protects the delicate sensor element from mechanical damage, high air velocity, and particulate contamination.

Applications

Outdoor Compressed Air Piping: Monitoring dew point on exterior main headers, exposed distribution lines, and unheated outdoor plant bridges.
Extreme Washdown & Process Zones: Moisture tracking in food processing, beverage bottling, and chemical plants requiring high ingress protection (IP67).
High-Purity Gas & Nitrogen Lines: Moisture detection in nitrogen, oxygen, argon, and carbon dioxide bulk storage or delivery systems.

CS Instruments FA 550 – Dew Point Sensor

CS Instruments FA 550 – Dew Point Sensor The FA 550 is ideally suited for outdoor dew point measurement and reliably determines dew points even under harsh industrial conditions.

CS Instruments FA 550 is a rugged, heavy-duty dew point sensor housed in an IP67 die-cast aluminum enclosure designed for harsh outdoor installations and demanding industrial environments.

Core Operational Functions

Integrated Alarm Switching: Onboard relay contact (up to $60\text{ V DC}, 0.5\text{ A}$ triggers local warning beacons, horns, or compressor shutdown interlocks when moisture exceeds configured limits.

Dual Output Architecture: Transmits an analog 4–20 mA current loop (2-wire or 4-wire configuration) alongside an RS-485 Modbus-RTU interface for continuous remote reporting.

On-Head Display & Keypad (Optional): Integrated graphic screen with optical touch buttons allows field configuration, threshold adjustment, and diagnostic evaluation through a sealed glass window.

Specifications

Parameter

Specification

Measuring Ranges

Option 1: $-80text{ to }+20text{ }^circtext{Ctd}$ (Adsorption / Desiccant dryers)

Option 2: $-20text{ to }+50text{ }^circtext{Ctd}$ (Refrigeration dryers)

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

Outputs

Scalable

4text{--}20text{ mA}

, RS-485 Modbus-RTU, and 1× Alarm Relay

Power Supply

24text{ V DC}

18text{--}30text{ V DC}

, max

5text{ W}

)

Enclosure Rating

IP67 robust die-cast aluminum housing

Operating Temp

-20°C to +70°C

Features

Condensation Immunity: Capable of withstanding saturated air ( $100%text{ RH}$ ) without calibration drift, sensor degradation, or permanent damage.

Particulate Filter Protection: Stainless steel sintered cap protects the delicate sensor element from mechanical damage, high air velocity, and particulate contamination.

Applications

Outdoor Compressed Air Piping: Monitoring dew point on exterior main headers, exposed distribution lines, and unheated outdoor plant bridges.

Extreme Washdown & Process Zones: Moisture tracking in food processing, beverage bottling, and chemical plants requiring high ingress protection (IP67).

High-Purity Gas & Nitrogen Lines: Moisture detection in nitrogen, oxygen, argon, and carbon dioxide bulk storage or delivery systems.

CS Instruments FA 550 – Dew Point Sensor

Product Note:

Description