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t-switch
Technical Information
TI014A/05/e/03.01
t-switch
Flow switch for liquid
and gas
Product Structure ATT11-
Endress+Hauser
GmbH+Co
Instruments International
Colmarer Str 6
D-79576 Weil am Rhein
Germany
Tel:+49 (7621) 97 5 02
Fax: +49 (7621) 97 53 45
www.ii.endress.com
Endress+Hauser Ltd.
Floats Road
Manchester M23 9NF
United Kingdom
Tel: 0161 286 5000
Fax: 0161 998 1841
www.uk.endress.com
Technical Information
TI014A/05/e/03.01
Approvals
A For use in non-hazardous areas
B FM General Approval (pending)
C CSA General Approval (pending)
Y Special – please specify
Sensor Form
11 Flat face sensor
12 Flat face sensor, insertion 125mm
13 Flat face sensor, insertion 235mm
21 Probe sensor
22 Probe sensor, insertion 125mm
23 Probe sensor, insertion 235mm
99 Special – please specify
Process Connection
(Material 1.4435/316L unless stated)
D1 G
3
/
4
" BSP, (Boss Included)
D2 G
3
/
4
" BSP, Brass (Boss Included)
Brass compression fitting for insertion
sensor only
F1 NPT
3
/
4
" (Boss Included)
F2 NPT
3
/
4
", Brass (Boss Included)
Brass compression fitting for insertion
sensor only
J1 DN40 Dairy coupling DIN 11851
K1 DN50 Dairy coupling DIN 11851
L1 Varivent >=DN50
M1 Tri Clamp 1
1
/
2
" ISO2852
N1 Tri Clamp 2" ISO2852
P1 DN50 Aseptic coupling DIN 11864-1
Y9 Special – please specify
Surface Finish, Wetted Parts
1 Standard Metal Finish
2 Ra<1.5 µm/120 grit
3 Ra<0.8 µm/150 grit (3A/EHEDG)
5 Ra<1.5 µm/120 grit, O2duty
6 Ra<0.8 µm/150 grit, O2duty (3A/EHEDG)
7 Standard Metal Finish, O2duty
9 Special – please specify
Electronics & Outputs
A Relay Output, No Display, power supply –
18-30V DC/AC (50/60Hz)
B Relay Output, 4 digit LCD, power supply –
18-30V DC/AC (50/60Hz)
St. St. Housing only
Y Special – please specify
Housing & Cable Entry
4D Polyester Housing IP66 M20 Gland
4H Polyester Housing NEMA4X NPT
1
/
2
" entry
6D SS304 Housing IP66 M20 Gland
6H SS304 Housing NEMA4X NPT
1
/
2
" entry
9Y Special – please specify
Documentation
1 Standard Documentation
2 EN10204-2.3 Pressure test
1.5 x pressure rating for 3 minutes
9 Special – please specify
ATT11- Order Code
United Kingdom All Other Countries
Performance and Selection
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Measuring Principle
Sensor Type
Liquid (flat face)
Figures referenced to water
Ranged 0-1.5m/sec (provisional)
Time Response: 5 sec rising
< 5 sec falling
(0-66% step change)
Gas (probe)
Figures referenced to Air
Ranged 0-30m/sec (provisional)
Time Response: 15 sec rising
10 sec falling
(0-66% step change)
Extended versions available with alternative
process connections.
Thermal technology is a well established operating principle in the process industry used on a
wide variety of applications. It operates by monitoring the cooling effect of a fluid stream as it
passes over a heated transducer (RTD). The fluid flows over two RTD elements one of which
senses the actual fluid temperature and provides a reference whilst the other is heated to ensure a
constant differential temperature above the fluid temperature. The applied power needed to
maintain this differential is proportional to the mass flow of the fluid.
Planning and Installation
Guidelines
LIQUID
GAS
LIQUID
GAS
LIQUID (Partially Full)
LIQUID
GAS
LIQUID
GAS
LIQUID
GAS
LIQUID
GAS
LIQUID (Dirty)
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29.5
Performance and Selection
Process Plant
Features and Benefits
Chemical Industry
• Single device for liquids and gas
• Wide dynamic rangeability
• No moving parts – reduced maintenance
• Simple and reliable to install and programme
• Wide selection of process connections
• Incorporates fuzzy logic control algorithm allowing manual adjustment of meter sensitivity to suit
application requirements
• Dry run protection for pumps
• Control of cooling systems for pumps, turbines, compressors and heat exchangers
Water Treatment
Beverage Industry
• Status indication of valves in water distribution systems
• Chemical dosing
• Air injection
• Filter control
• Monitoring cleaning processes
Dairy Industry
• Cooling systems in refrigeration plants
• Chemical dosing
• Monitoring pump function
Applications
• Mount upstream of control valves, hand or isolation valves
• Ensure sensor is aligned with direction of flow (see manual)
• For liquids ensure full pipes
• Avoid areas of cavitation (liquids)
• For gases avoid areas where condensate collects
• Avoid applications with large process temperature changes
• Avoid mounting device where exposure to extreme ambient temperature changes occurs e.g.
direct sunlight
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18-30V AC/DC (50/60Hz)
24V DC @ 0.5 A
120V AC @ 0.5
A
Power
1
+
2
-
3
4
For BSP and NPT threads
"L"
Process Connection
Extended Sensor
Planning and Installation
Guidelines
Sensor Orientation
• Each process connection has an orientation
mark, this should be positioned in line facing
the oncoming flow.
• Sensor should be installed such that the
sensing surface is in contact with the flowing
medium at all times.
• There is an allowed orientation tolerance of
+/- 5° from centre.
Sanitary Sensor
• It is the responsibility of the user to ensure
that the volume enclosed by the mounting
boss has sufficient dimensions to ensure
adequate cleaning takes place.
Mounting and Installation
Note:
5º
5º
Flow
Direction
Electrical Connection
Operation
Insertion Sensor
Mounting Boss
Accessories
Display socket
LED for
Switchpoint/Error
Indication
Note: In order to meeet EMC requirements, screened or shielded cable is recommended.
8 DIL Programming
Switches
LED (Light Emitting Diode)
• Illuminates when measured flow above switchpoint.
• Off when measured flow below switchpoint.
• Flashes to indicate an error.
LCD (Liquid Crystal Display)
• Optional display used to indicate flow as a percentage of maximum. Also displays programming
information and error codes (not essential for programming).
Threaded Flanges
with G
3
/
4
BSP or
3
/
4
NPT thread for mounting a
t-switch.
Available sizes: DN25 PN25
ANSI 1" 150lbs
DN40 PN25
ANSI 1
1
/
2
" 150lbs
DN50 PN25
ANSI 2" 150lbs
Avoid installing in areas of extreme flow
turbulence. For example:
• Directly after bends or
expansions/reductions.
All downstream dimensions provided only
as a guideline and wherever possible
greater dimensions should be considered.
• Directly after pumps, fans and
compressors.
>10 dia
• Directly downstream of isolation and
control valves.
>50 dia
>25 dia
H = ≤
1
/
3
D
Dimensions of extended versions (L in mm)
Sensor Option
Flat-Face
Probe
Insertion 125mm
125
125
Insertion 235mm
235
235
Side view End view
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All dimensions in mm
Polyester Housing
No display
Steel Housing
No display
Steel Housing with
Extended Lid
With display
Housing and Sensor
Process
Connection
Dimensions with
Flat-Face Sensor
Dimensions with
Probe Sensor
Process Limits
Process Connection
Process Conditions
Materials
Process Connections
Performance Limits
Human interface
Electrical
BSP
3
/
4
" (G)
max 25 bar A
max 80°C
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29.5
3
/
4
" NPT
max 25 bar A
max 80°C
29.5
12.8
Sanitary coupling
DN40
DN50
to DIN 11851
max 25 bar A
max 80°C
29.5
Varivent
DN50
max 10 bar A
max 80°C
29.5
∅68
Triclamp
1
1
/
2
"
2"
ISO 2852
max 16 bar A
max 80°C
29.5
Aseptic coupling
DN50
to DIN 11864
max 25 bar A
max 80°C
29.5
52
36
52
52
52
52
∅85
max 76
max 130
∅76
max 64
max 125
∅76
max 64
max 145
Technical Data
• Nominal Process Diameters: DN25-1000
• Process Pressure Range: 25 Bar g (Process fitting dependent)
• Process Temperature Range: -10 to +80°C
• Meter Body: 1.4404/1.4435/316L
• Transducers: 1.4404/1.4435/316L
• Polyester Housing: PBT-FR (polyester) with cover in PBT-FR or with transparent cover in PA 12,
Seal of cover; EPDM
• Steel Housing: 1.4301 (AISI 304), seal of cover silicone
• Cable Gland: Polyamide
• Parallel thread BSP
3
/
4
" (includes brass
3
/
4
" compression fitting for insertion sensors only)
• Tapered thread
3
/
4
" NPT (includes brass
3
/
4
" compression fitting for insertion sensors only)
• Sanitary coupling DN40, 50 to DIN 11851
• Varivent DN50 to factory standard Tuchenhagen
• Triclamp 1
1
/
2
", 2" to ISO 2852
• Aseptic coupling DN50 to DIN 11864
• Accuracy: ± 5% of full scale
• Repeatability: ± 1% of full scale
• Time Response Flat Face: 5 sec rising, < 5 sec falling
• Time Response Probe: 15 sec rising, 10 sec falling
• Flow Ranges Liquid: 0-1.5m/sec ref. to water (provisional)
• Flow Ranges Gas: 0-30m/sec ref. to air (provisional)
• Electronic Insert: 8 DIL switches for commissioning
• Red LED to indicate switching status, flashes under fault condition
• Optional Display: 4 numeric characters with bar graph
• Power Supply: 18-30V DC /AC (50/60 Hz)
• Power Consumption: <3W
• Relay Output: Selectable Normally Closed (NC) or Normally Open (NO) (NO as factory default)
Environment
• Storage Temperature Range: -20 to +80°C (without LCD)
• Ambient Temperature Range: -10 to +65°C (without LCD)
• Degree of Protection: Polyester and steel housings: IP66 to EN 60529
• Vibration Resistance: Up to 1g, 10....150Hz to IEC 60068-2-6
• Shock Resistance: to IEC 60068-2-31
• Electromagnetic Compatibility (EMC): IEC 801 part3: E = 10V/m (30MHz...1GHz)
Approvals
Approvals Pending
EHEDG, all wetted materials FDA listed. Meets the requirements of 3A.
CSA General Approval, FM General Approval.
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