Warrick® Conductivity-Based Liquid Level Control

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Warrick® Conductivity-Based
Liquid Level Control
The concept is simple: Take advantage of a liquid’s conductive properties to complete
a circuit and cause a control relay to actuate. Use of permanently-mounted stationary
electrodes gives the user precise accuracy, repeatability and no-moving-parts
reliability.
Application Versatility
Pumps. For feeding of elevated tanks; drainage of wastewater from industrial
sumps; batch processing; irrigation and flood control; sewage disposal; seal leakage
detection.
Boilers. Supervise feedwater flow; critical low water cutoff protection; alarm
functions.
Steam. Steam cookers; steam generators; evaporators; sterilizers. Automatic shut
off of heat source in the event of a low water level; proper water level maintenance
through the energizing of a solenoid valve.
Drink Dispensers. Control the carbonator tanks’ water level.
Contents
Page Start
General Purpose Plug-In Modules .................. E-4
General Purpose Open Board Controls ....... E-6
Low-Water Cutoff Controls ..........................E-7
Relay Output..................................................E-9
Kits and Options .........................................E-10
Relay Output................................................E-12
Intrinsically Safe Controls..........................E-14
Multi-Function Controls .............................E-16
Fittings and Probes .....................................E-17
Panel Controls and Alarms ........................E-26
High and/or Low Level Alarms. In boilers, process and storage tanks and similar
equipment.
WARRICK CONDUCTIVITY SENSORS
Solenoid Control. As simple on/off devices, for process control.
Fuel. Fuel storage tank level detection and leakage indication.
Sewage. Sewage and waste water level detection.
Specialty Control Panels.
System Components
The illustration, to the right, graphically defines the typical Warrick® liquid
level control system, which includes three basic elements:
1. Controls. The control is an electrical device with contacts that open and close
in response to liquid levels sensed by the probes. Because it is wired directly to
the power source and to the sensing source, it can send signals that activate or
de-activate solenoids, pumps, or alarms.
Warrick® controls are available in many different designs and sensitivity ratings for
a wide range of application requirements.
2. Fittings. The fitting is a housing that holds the probes (or floats), insulates them
from the vessel, and provides a means of connection to the control.
Example of Warrick System Application
The liquid level control system shown here is designed
for “pump up” application. The pump will start refilling
the vessel when the liquid reaches the lower probe tip,
then stop refilling the vessel when the liquid reaches
the higher probe tip.
Pump-up system
A.C. SUPPLY LINE
1. CONTROL
2. FITTING
3. PROBES
PUMP
STOP
Warrick fittings are available for single-probe or multi-probe applications, for
mounting to vessels in a variety of ways, and in open or pressure tight styles.
®
3. Probes. The probe is a sensor that extends downward from the fitting, with the tip
positioned precisely at the level where the control should be activated.
Warrick® probes are available in a variety of materials to suit different liquids and a
variety of lengths to fit different depth requirements.
E-1
Order from: C A Briggs Company - 632 Davisville Road - Willow Gove, PA
19090
Phone: 215-784-9250 - Fax: 215-784-0611 - E-Mail: [email protected] - www.cabriggs.com
GROUND
REFERENCE
PUMP START
Warrick Intro / p1of3 / 3-APR-14
INTRODUCTION
Principle of Operation
Solid State Controls employ two separate
circuits, one for sensing and
comparing current flow and one
for energizing the output relay.
This ‘switch within a switch’
allows solid state controls to
operate at much lower secondary
voltages (12VAC typical), and much
higher sensitivities. Advantages of
this technology include reduced shock
hazard, one moving part the output
relay, wide sensitivity range and latching
capability for auto refill or empty applications.
Intrinsically Safe Controls are solid
state controls which limit current
and voltage to a level incapable
of igniting flammable gasses,
vapors or dust. They can be
used as conductivity liquid level
controls or with dry contact
devices such as Gems Flow and
Level Switches or other non voltage
storing or producing devices.
Sensitivity Data
Sensitivity vs. Maximum Probe Wire Distances – in feet*
Ohms
Series
17
Series
27, 37
Series
47
Series
67
Series
26, 26M
Series
19MR
Series
DF
50
—
—
—
—
—
—
—
—
450
—
—
—
—
—
—
—
—
1,500
—
—
—
—
—
—
—
—
3,000
—
—
4000
—
—
—
—
—
3,300
—
5000
—
—
—
—
—
—
4,700
10000
3500
—
—
4000
900
—
900
7,000
—
—
—
—
—
—
—
—
10,000
5700
1750
900
—
2400
600
—
600
11,000
—
—
—
—
—
—
5500
—
19,000
—
—
—
—
—
—
3000
—
20,000
—
—
—
—
—
—
—
—
22,000
—
1000
—
—
—
—
—
—
26,000
2200
—
—
1500
1200
250
—
250
47,000
—
500
—
—
—
—
—
—
50,000
1075
—
—
900
600
—
—
—
100,000
570
250
75
—
—
—
—
—
470,000
270
—
—
—
—
—
—
—
1,000,000
38
—
—
400
300
—
—
—
3,000,000
5,500,000
WARRICK CONDUCTIVITY SENSORS
Controls
Series
16, 16D, 16M,
16DM, 16VM
Contact factory for more information
* Based on type MTW or THHN #14 or #16 AWG wire. Other wire size and sensing medium may reduce overall maximum distance.
Notes:
1. DC on probe circuit-maximum distance between control and probe is limited to the total resistance of the wire and liquid.
2. Total resistance must not exceed the sensitivity of the control.
3. On controls directly connected to floats rather than probes, maximum distance is limited only to the total resistance of the wire.
4. AC on probe circuit has greater restrictions on maximum distance.
Warrick Intro / p2of3 / 3-APR-14
Order from: C A Briggs Company - 632 Davisville Road - Willow Gove, PA
19090
Phone: 215-784-9250 - Fax: 215-784-0611 - E-Mail: [email protected] - www.cabriggs.com
E-2
Sensitivity & Material Selection
Liquid or Material
WARRICK CONDUCTIVITY SENSORS
E-3
Acids3
Aluminum Hydroxide
Aluminum Sulfate
Ammonia
Ammonium Chloride
Ammonium Hydroxide
Ammonium Nitrate
Ammonium Sulfate
Baby Foods
Barium Chloride
Barium Nitrate
Beer
Black Liquor
Borax – Aqueous
Bourbon
Brine
Buttermilk
Cadmium Chloride
Cadmium Nitrate
Cake Batter
Calcium Chloride
Calcium Hydroxide
Catsup
Caustic Soda
Cement Slurry
Coffee
Corn Syrup
Corn – Cream Style
Ferric Chloride
Ferrous Sulfate
Ink (Water Base)
Jams/Jellies
Juices – Fruit/Vegetable
Lithium Chloride
Magnesium Chloride
Magnesium Hydroxide
Mayonnaise
Mercuric Chloride
Milk
Molasses
Mustard
Oil – Soluble
Paper Stock
Photographic Solutions
Plating Solutions
Potassium Chloride
Salts – Chemical
Sewage
Silver Nitrate
Soap Foam
Sodium Carbonate
Sodium Hydroxide
Soups
Starch Solutions
Vinegar – Aqueous
Water – Carbonated
Water – Condensate
Water – Chlorinated
Water – Distilled
Water – Deionized
Water – Hard/Natural
Water – Salt
Water – R.O.
Wine
Zinc Chloride
Zinc Sulfate
Sensitivity-Conductivity
Ohms/cm
Micro-Mhos/cm
Consult Factory
2.2K
2.2K
5K
1K
10K
18K
10K
1K
1K
1K
2.2K
1K
10K
200K
1K
1K
1K
1K
5K
1K
10K
2.2K
1K
5K
2.2K
45K
2.2K
10K
10K
2.2K
45K
1K
1K
1K
2.2K
5K
90K
1K
10K
1K
10K
5K
1K
2.2K
1K
2.2K
5K
1K
18K
2.2K
1K
1K
5K
2.2K
3K
18K
5K
450K
2.0M
5K
2.2K
18M
2.2K
1K
2.2K
450
250
200
1K
100
50
100
1K
1K
1K
450
1K
100
5
1K
1K
1K
1K
200
1K
100
450
1K
200
450
21
450
100
100
450
21
1K
1K
1K
450
200
11
1K
100
1K
100
200
1K
450
1K
450
200
1K
50
450
1K
1K
200
450
330
50
200
2
0.5
200
450
0.056
450
1K
450
Probe Material
Good1
Better2
Consult Factory
316 Stainless Steel
Titanium
316 Stainless Steel
Hastelloy C
316 Stainless Steel
N.A.
316 Stainless Steel
Titanium
316 Stainless Steel
Titanium
316 Stainless Steel
316 Stainless Steel
316 Stainless Steel
Titanium
316 Stainless Steel
316 Stainless Steel
Carpenter 20
N.A.
316 Stainless Steel
N.A.
316 Stainless Steel
316 Stainless Steel
Consult Factory
Brass
316 Stainless Steel
N.A.
316 Stainless Steel
N.A.
Hastelloy C
N.A.
316 Stainless Steel
316 Stainless Steel
N.A.
316 Stainless Steel
N.A.
316 Stainless Steel
316 Stainless Steel
Carpenter 20
Hastelloy C
316 Stainless Steel
Titanium
316 Stainless Steel
316 Stainless Steel
316 Stainless Steel
Hastelloy B
316 Stainless Steel
316 Stainless Steel
316 Stainless Steel
316 Stainless Steel
316 Stainless Steel
316 Stainless Steel
316 Stainless Steel
316 Stainless Steel
N.A.
Titanium
Carpenter 20
Titanium
N.A.
316 Stainless Steel
316 Stainless Steel
316 Stainless Steel
316 Stainless Steel
316 Stainless Steel
N.A.
Carpenter 20
316 Stainless Steel
Carpenter 20
316 Stainless Steel
N.A.
316 Stainless Steel
316 Stainless Steel
N.A.
Titanium
316 Stainless Steel
316 Stainless Steel
316 Stainless Steel
316 Stainless Steel
316 Stainless Steel
316 Stainless Steel
N.A.
316 Stainless Steel
Titanium
N.A.
316 Stainless Steel
Hastelloy C
N.A.
316 Stainless Steel
316 Stainless Steel
Titanium
Monel
N.A.
316 Stainless Steel
316 Stainless Steel
316 Stainless Steel
Carpenter 20
316 Stainless Steel
316 Stainless Steel
316 Stainless Steel
Monel
316 Stainless Steel
Hastelloy B
316 Stainless Steel
316 Stainless Steel
316 Stainless Steel
316 Stainless Steel
316 Stainless Steel
Carpenter 20
316 Stainless Steel
316 Stainless Steel
Brass
316 Stainless Steel
316 Stainless Steel
Monel
Brass
316 Stainless Steel
Brass
316 Stainless Steel
Brass
316 Stainless Steel
Monel
N.A.
N.A.
N.A.
316 Stainless Steel
316 Stainless Steel
Carpenter 20
Titanium
316 Stainless Steel
Titanium
Order from: C A Briggs Company - 632 Davisville Road - Willow Gove, PA
19090
Phone: 215-784-9250 - Fax: 215-784-0611 - E-Mail: [email protected] - www.cabriggs.com
Notes:
1. Less than .020˝ erosion per
year.
2. Less than .002˝ erosion per
year.
3. Liquid concentration and
temperature will affect
conductivity and material
erosion rate. Contact factory
for detailed information.
N.A. – No material available with
this erosion rate.
Warrick Intro / p3of3 / 3-APR-14

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