4501 Pump Station Monitor

  • Portable, compact and easy to install
  • Never needs calibration, and there are no level sensors to install
  • Simply connect the inputs to anything that turns on or off when the pumps are activated, such as elapsed timers, indicator lights, or pump motor starters.
Product Options


The 4501 pump station monitors lift station pumps as the wet well is filled and emptied. It then uses patented algorithms and the known volume between the levels in the wet well to calculate the flow into and out of the pump station and the rate of each pump. The 4501 measures pump capacity and influent flow at most pump stations to an accuracy of 1% by using drawdown calculations rather than the manufacturers pump curves

Statistics show that intermittent electrical problems develop before the situation can be detected by an operator at over 30% of pump stations. The 4501 pump station flow monitor can uncover these problems as they occur and while repair is still simple and inexpensive. This can prevent sewer backups and other problems.

The 4501 pump station monitoring system can detect abnormal activity such as:

  • Chattering relays
  • Alternator failures
  • Jammed/worn impellers
  • Variations in pump rate
  • Stuck check valves
  • Changes in level switches
  • Power Failures

Recorded data is stored in the 4501's memory for analysis on a PC running Isco Pumplink Software.

Standard Features of the 4501

  • No level sensors to install and never needs calibrating.
  • Easy installation - Simply connect the inputs to anything that turns of or off when the pumps activate, such as indicator lights, pump motor starters or elapsed timers.
  • Ideal for portable use with a compact design.

Manufactured by: Teledyne ISCO
Model: 4501 Pump Station Monitor

Services offered for this product

  • Sales
  • Rental
  • Installation
  • Calibration
  • Maintenance


Sewer flow monitoring
Inflow & Infiltration studies
Pump station performance studies
Pump Station flow monitoring


4501 Pump Station Monitor
Size (H x W x D) 3.75 x 3.75 x 7.1 in. (9.5 x 9.5 x 18.1 cm)
Weight 1.4 lbs. (0.63 kg)
Material Polyphenylene oxide
Enclosure Standard ¼ DIN; Portable protective enclosure with carrying handle is optional
Power 12V DC, 250 mA
Storage Temperature -40 to 140°F (-40 to 60°C)
Operating Temperature 0 to 140°F (18 to 60°C)
Display Backlit liquid crystal, 2 lines, 32 characters
Keypad membrane, 4 position
Data Storage and Communication
Capacity 29,000 events maximum
Storage Mode Rollover
Program Memory Battery backed RAM; can be updated via interrogator port without opening the enclosure
Data Retrieval Direct RS-232 connection, Optional internal telephone modem
Data Analysis Isco Pumplink Software (compatible with Windows 95, 98, 2000, NT, and XP)
Flow Measurement Accuracy ±1% totalized flow, ±8% cycle to cycle typical (Does not include errors in wetwell measurements. With Pumplink software ±5% cycle to cycle is typical)
Relay Outputs 2 normally open, rated 1A at 30V DC or 0.3 A at 125V AC, one proportional to outflow, one activated based on minimum and maximum analog inputs and abnormal pump capacity
Pump Inputs 3, rated 12 to 120V AC or DC
Connection Anything that turns on or off when the pumps are activated
Analog Outputs 2 proportional to inflow and outflow rates, 4 to 20 mA into a maximum of 400 ohms
Digital Inputs 4, rated 12 to 120V AC or DC
Analog Inputs 8 single-ended mixed with (optional) 4 differential, individually selectable 4 to 20 mA or 0 to 5 V