MODEL
873
ULTRASONIC LEVEL CONTROLLER
PUMP
CONTROLLER & LEVEL TRANSMITTER/ALARM
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
- Automatic pump rotation.
Time delay
- 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
- 10 AMP relays for alarm
or pump control
- Two relay and four relay
configurations
- Large 16 character alphanumeric
LCD readout for setup, calibration, and level display
- NPT, flanged, sanitary,
or stem mounting
- Automatic temperature
compensation
- Built-in voltage spike
and spark protection
Application
The Delta
Controls Model 873 Ultrasonic Level Transmitter is used to switch relays
based on 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
- Relays: Two
or four 10 amp SPDT @ 125/250 VAC
- Pump Rotation:
Selectable or alarms
- Pump Starting
Time Delay: Adjustable
- Supply Power:
120 or
240 VAC
- Housing: NEMA
4x hose proof, polycarbonate
- Setup: Prompt
driven on screen
- Calibration:
2 point,
pushbutton
- 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)
- Maximum Loop Loading:
600 ohms
- Process Operating
Temperature: -40° F to +275° F (135° C)
- Ambient Operating
Temperature: -40° F to +160° F (70° C)
- Working Process
Pressure: Up
to 50 psig (3.5 bar)
- Cable: Up to
50 feet between sensor and electronics housing
- Wetted Materials:
PVC or Kynar® (PVDF)
- Mounting Connection:
NPT, stem, ANSI or sanitary flange