MODEL
872
ULTRASONIC LEVEL TRANSMITTER
TWO
WIRE, LOOP POWERED
Download the Detailed
Delta Controls Datasheet
Download the Bracket Mounting Accessory Datasheet
Note: You will need
the Acrobat Reader to view the data sheets. 
Features
- Field proven ultrasonic
measuring circuitry
- Fuzzy logic algorithms
enhance speed and reliability
- Simple calibration.
It is not necessary to drain or fill the tank. Any two level points
can
be
used
- Can be reverse calibrated
at will (20 mA = empty)
- Design is accurate,
simple, and very reliable
- Process temperature
range from -40° F To+275° F
- Intrinsically
Safe Electronics design improves safety and lowers the cost of Installation
and operation
- Temperature corrected
for changes in speed of sound. Digital tank condition algorithm
- Large 16 character alphanumeric
LCD readout for setup, calibration, and level display
- NPT, flanged, sanitary,
or stem mounting
- Sealed electronics survives
harsh environments
- Built-in voltage spike
and spark protection
Application
The Delta
Controls Model 872 Ultrasonic Level Transmitter is used to measure and
transmit the level of liquids, slurries, and granular solids. The sensor is
not in contact with the measured material. This feature avoids the usual problems
and high maintenance costs commonly associated with the measurement of sticky,
gummy, dirty, and corrosive materials.
It will accurately measure almost
any kind of liquid, including water, oil, acid, caustic, soup,
milk,
gear lube, and antifreeze. It is particularly advantageous when used on fuel
oil tanks, cooling tower basins, fruit juice day tanks,
irrigation channels, and pharmaceutical reactors. It can easily measure slurries
such as vegetable soup and pulp stock. It works well when measuring granular
solids such as pecans, potatoes, corn, concrete chunks, paper stacks, and lump
coal, however the maximum range is reduced.
Specifications
- Measurement
Range: 6 inches to 50 feet in 4 ranges
- Beam Angle: ± 6°
at the 3 dB down boundary
- Output: 4-20
mADC, 2 wire, loop powered, directly or inversely proportional to level; isolated
- Damping: Software
selectable
- Echo Signal:
Action is displayed on screen
- Loss of Echo Indication:
Yes
- Built-in Temperature
Compensation: Yes
- Accuracy: Better
than ± 0.25% of max target range (in air)
- Loop Supply Voltage
Range: 12-30 VDC
- Maximum Loop Loading:
900 ohms @ 30 VDC
- Process Operating
Temperature: -40° F to +275° F (135° C)
- Ambient Operating
Temperature: -40° F to +160° F (70° C)
- Cable: 10 feet
of 2 wire, robust rubber jacketed
- Wetted Materials:
PVC or Kynar® (PVDF)
- Mounting Connection:
NPT, stem, ANSI or sanitary flange
- Working Process Pressure:
Up to 50 PSIG (3.5 bar)
OPTIONS
- Intrinsically Safe:
Class I, Division 1 & 2, for Hazardous Areas ABCD; and 4X Hoseproof
- Modifications: As required
to suit the user’s application
Third Party
Approvals
- CSA (Canada) NRTL/C
(USA) Intrinsically safe
- Environment proof
- 3A Sanitary, worldwide
- ISO-9001 Quality System
Available Measurement Ranges
| Model |
Minimum |
Maximum |
|
Model |
Minimum |
Maximum |
|
872H*
872C*
|
6 inches
9 inches
|
10 feet
20 feet
|
872D*
872E
|
12 inches
16 inches
|
30 feet
50 feet
|
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