Description

Características

1

CF12 EX Proof Flow Switch

The CF12 Thermal Dispersion Flow Switch with Exproof Housing (GX) comes standard with a Universal Power Supply: 24Vdc or 85 to 264Vac. This unit offers reliable liquid and gas flow detection ideally suited for just about any Flow/ No Flow application. Unlike the CF12 with either the small nylon housing (N1) or the small aluminum housing (G1), the CF12 with large aluminum housing (GX) comes with two independent SPDT relay.

Like all of Sitron’s products, the CF12 can be configured to accommodate our customer’s unique process control requirements. All models can be ordered with a great variety of threaded, flange, or sanitary process connections as well as Halar or epoxy coating for aggressive mediums. The CF12 is also offered with extended necks for higher temperature applications up to 150 ºC. And while the CF12 is designed to monitor flow status of liquids and gases, with its no moving parts technology it can also be an ideal solution for liquid level detection.

The GX comes standard with a glass window which enables visualization of LED switch status. The GX housing comes with the following certifications: UL, cUL, IECEX and ATEX for installation in hazardous environments.

- Explosion-proof housing (EX d).

- Robust with no moving parts.

- Corrosion resistant 316 SS Body

- Can be Halar coated to corrosive and aggressive media

- Excellent sensitivity at low flow

- Fast time flow or level response

- Protection Class IP66 (IEC 60529)

- Range of Set-Point.- 3cm/s to 3m/s (Liquids)- 5cm/s to 5m/s (gas)

- Signal Output.- Relay 2x SPDT

- Protection:- Reverse Polarity

- Voltage Surge - Electromagnetic Interference

- Various types of process connections:Thread, Flange and Sanitary

Dimension (mm)

16

1

37

.5L

Hex. 1 5/8”

NPT / BSP

3/4” NPT

127

Power Supply: AC: 85...240Vac (50/60hz) and 125Vdc DC: 24Vdc (± 10%)Consumption: 130mAOutput: Relay (2 SPDT) 5A - 250VacMeasuring Range: Liquids: 3cm/s...3m/s Gas: 5cm/s...5m/sAccuracy: ± 10%Response time: 1...10 secTemperature Gradient: 15°C/minIndication: Bargraph 8 led´sFlow indication (LED): Red = Flow below the set point Yellow = set point (Relay ON) Green = flow above the set pointHousing: Aluminum with glass viewing windowElectrical Connection (cable entry): 2 x 3/4” NPTProcess Connection: BSP, NPT, flange or SanitaryBody Material: 316S.S ( Hallar coating)Work Temperature: -10...+80°C (Sanitary option: peaks of 120°C)Max Pressure: 100 Bar (others pressures upon request)Class Protection: IP66Approvals EX proof Housing (Optional): ATEX, DEMKO 07 ATEX 0622294, 0539 II 2 G EX d IIC Gb 0539 II 2 D Ex tb IIIC Db IECEx IECx UL 08.0005U Ex d IIC Gb Ex tb IIIC DbClassifications: Class I, Div. 1, Groups B, C, D Class II, Div. 1, Groups E, F, G Class IIINEMA Type 4X: Class I Zone 1 A Ex d IIC Ex d IIC (canada)

CF12AC/DC-X-X-X-X-GX (2 SPDT)

Technnical Specification

L= Insertion Length

2

CF12

Flow 100 %0

Adjust

5A 250Vac

+ -

1 2 3 4 5 6 7 98

3

Extended Neck for Higher Temperatures

MT - Medium (up to 120ºC)AT - High temperature (up to 150ºC)HT - Ultra High temperature (up to 250ºC)

Ultra High temp. neck w/heat dissipating rings

HTAT MT

50

mm 1

00

mm

10

0m

m

Technology

The flow switches utilize the principle of thermal dispersion. A typical configuration that uses a set temperature detector for resistance (RTD's), platinum, placed on the sensor tip. One of the sensors is used as the heater and the other is used as a reference by monitoring the fluid temperature. With the displacement of the fluid occurs the heat dispersion of heater which is inversely proportional to flow. With the temperature change of the heater, the CF12 indicates the presence or absence of flow.

Fluid Stopped

Temperature SensorHeater

Heat dispersion by moving Fluid

Fluid Flow

Moving

Operating Principle Thermal Dispersion

Insertion Length

Providing the measure (L) as illustrated:

L

Center

L- Insertion length

Rev_5.16

Sitron - BrasilR. Baronesa de Itu, 83

São Paulo - SP - 01231-001T .: (5511) 3825-2111F.: (5511) 3825-2171

www.sitron.comBRASIL: vendas@sitron.com

USA / Other Countries: info@sitron.com

Sitron - USA1800 Prime PlaceHauppauge, NY 11788PH: 516-935-8001FX: 800-516-1656

CF12AC/DC

MODEL

SIZE

3

4

5

6

7

0

X

8

9

A

B

3/4”

1”

1 1/2”

2”

2 1/2”

3”

4”

OTHER

1 1/4”

Metric Thread

B

D

E

F

G

H

J

K

L

M

N

R

S

T

YX

BSP

FLANGE ANSI 150# - Carbon Steel Painted

FLANGE ANSI 150# - 316 SS

FLANGE ANSI 150# - PVC

FLANGE ANSI 300# - Carbon Steel Painted

FLANGE ANSI 300# - 316 SS

FLANGE ANSI 300# - PVC

FLANGE ANSI 150# - 304 SS

FLANGE ANSI 300# - 304 SS

Metric Thread

NPT

SMS Female

SMS Male

TRI-CLAMP

FEMALE DIN - 316SS

OTHER - SPECIFY

L100

L35

L50

L75

L

35mm

50mm

75mm

100mm

SPECIFY

HOUSING

1

ELECTRICAL CONNECTION

3/4” NPT

OPTIONS

Medium Temp - 50mm 316SS Neck (80-120C)

High Temp - 100mm 316SS Neck (80-150C)

Max High Temp - w/ Heat Dissipating Coils 100mm 316SS Neck (80-200C)

PROCESS CONNECTION TYPE

INSERTION LENGTH

MT

AT

HT

S

HE

NONE

HALAR CoatedEPOXY Coated

COATING

R

CF12DC 4 G S L50 GX 1 MT

GX ALUMINUM w/ GLASS WINDOW (2 SPDT) 5A-250Vac (Ex d)

Order Code