Features

Easy Installation

Initial installation of our insertion sensor is as easy as installing a 1-inch female NPT fitting in the process piping. The submersible sensor can be suspended by its cable. Once installed, both turbidity sensors can be inserted and removed without interrupting process flow

Wide Dynamic Range

Our turbidity meter has four ranges from 0-2 NTU to 0-2000 NTU. The low-level range (0-2 NTU) has a resolution of 0.001 NTU and is useful in processes where very low turbidity measurement is required. The higher ranges can be used on raw water supplies and other processes where turbidity is monitored before filtering.

Instantaneous Response

Because the sensor optics are in the process stream, the Model 977-C turbidity monitor does not require bypass systems. Our in-stream measurement eliminates slow response times inherent with turbidimeters requiring bypass plumbing. This turbidimeter is extremely effective in streams, rivers, and lakes and in processes where filter monitoring is crucial, and efficiency or breakthrough must be detected quickly.

Data Communication

Our turbidimeter comes standard with an isolated 4-20mA output, and other outputs are available.

Minimal Maintenance

The Model 977-C uses a light source with a 13-year life expectancy which provides long-term stability and very low maintenance. Although our turbidity monitor is easily calibrated by the end user, calibration drift is minimal. Because sensor removal is simple, the optics can readily be cleaned as necessary.

Handles Harsh Process Conditions

The optical design of the sensor minimizes the effects of fluid color, flow, chemicals, temperature & pressure. Our turbidimeter operates under a wide range of temperature and pressure conditions. Robust wetted parts are 316 stainless steel and glass for high resistance to process chemicals.

Insertion or Submersible Sensor

Our standard insertion sensor is designed for pipe and tank wall installations. The optional submersible sensor is designed for open channel applications or open tank installations where the sensor can be lowered into the tank from above

A Variety of Options to Meet Your Needs

  • NEMA 4X watertight enclosure
  • Dual alarms with high/low set points
  • DC power (12 VDC and 24 VDC) with battery option
  • Pipe insertion/removal adapter for easy sensor access in pressurized process line

Warranty

Limited one-year warranty against defects in material and workmanship.

Easy Installation
Initial installation of our insertion sensor is as easy as installing a 1-inch female NPT fitting in the process piping. The submersible sensor can be suspended by its cable. Once installed, both turbidity sensors can be inserted and removed without interrupting process flow.

Wide Dynamic Range
Our turbidity meter has four ranges from 0-2 NTU to 0-2000 NTU. The low-level range (0-2 NTU) has a resolution of 0.001 NTU and is useful in processes where very low turbidity measurement is required. The higher ranges can be used on raw water supplies and other processes where turbidity is monitored before filtering.

Instantaneous Response
Because the sensor optics are in the process stream, the Model 977-C turbidity monitor does not require bypass systems. Our in-stream measurement eliminates slow response times inherent with turbidimeters requiring bypass plumbing. This turbidimeter is extremely effective in streams, rivers, and lakes and in processes where filter monitoring is crucial, and efficiency or breakthrough must be detected quickly.

Industrial Applications Include:

  • Potable water
  • Wastewater
  • Dairy
  • Mining
  • Chemical
  • Food and beverage
  • Breweries
  • Pulp and paper
  • Petrochemical
  • Forestry
  • Environmental

Installation & Instruction Manual

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Data Communication
Our turbidimeter comes standard with an isolated 4-20mA output, and other outputs are available.

Minimal Maintenance
The Model 977-C uses a light source with a 13-year life expectancy which provides long-term stability and very low maintenance. Although our turbidity monitor is easily calibrated by the end user, calibration drift is minimal. Because sensor removal is simple, the optics can readily be cleaned as necessary.

Handles Harsh Process Conditions
The optical design of the sensor minimizes the effects of fluid color, flow, chemicals, temperature & pressure. Our turbidimeter operates under a wide range of temperature and pressure conditions. Robust wetted parts are 316 stainless steel and glass for high resistance to process chemicals.

Insertion or Submersible Sensor
Our standard insertion sensor is designed for pipe and tank wall installations. The optional submersible sensor is designed for open channel applications or open tank installations where the sensor can be lowered into the tank from above.

A Variety Options to Meet Your Needs

  • NEMA 4X watertight enclosure
  • Dual alarms with high/low set points
  • DC power (12 VDC and 24 VDC) with battery option
  • Pipe insertion/removal adapter for easy sensor access in pressurized process line

Warranty
Limited one-year warranty against defects in material and workmanship.

There are no restrictions on the maximum pipe diameter into which the sensor can be installed. However, if a 2-inch or smaller line is to be monitored, install a 2-inch or larger “T” to prevent the sensor from blocking the line.

While any position on the periphery of the process pipe may be used to install the sensor, a position above the horizontal plane is recommended, particularly if the sensor is to be removed frequently. The sensor may either be installed through a "T" or a weldment that has been installed on the process pipe.

An insertion depth between 1" and 4" is suggested. If the process pipe is empty or filled with a clean fluid, position the sensor at a depth where a minimum reading is obtained on the meter. This is to assure that any internally reflected light from the process piping can be zeroed out. To further reduce internally reflected light, rotate the sensor so that the small center punch located below the junction box is facing upstream. In other words, if the process pipe is horizontal and the sensor is inserted into the top of the pipe, the center punch should be facing in line with the flow towards the upstream side. This permits a "scrubbing" action on the windows, and helps eliminate any buildup on the sensor while keeping reflected light at a minimum.

FEATURES

The Model 977-C is a rugged inline turbidimeter that monitors turbidity in process pipes, open channels or tanks. Our inline measurements provide instantaneous response, maximum accuracy, and highest reliability without costly bypass systems. The monitor has four turbidity ranges from 0-2 NTU to 0-2000 NTU.

Specifications

  • Wide dynamic range
  • Simple installation
  • Linear-isolated output
  • Stainless steel sensor
  • Designed for durability
  • High accuracy and reliability
  • Low maintenance
  • Field-serviceable
  • One-year limited warranty

Parts

Please refer to our parts list for part numbers and pricing.

Type Insertion Probe Submersible Probe
Size Pipes > 2 inches Open channel/tanks
Wetted Parts 316 Stainless Steel, Borosilicate Glass 316 Stainless Steel, Borosilicate Glass
Process Temperature -10C to 110C -10C to 60C
Pressure 0-150 psig 0-50 psig (110 feet of water)
Mounting 1 inch NPT male Cable or rigid mount
Diameter 0.875 inches 0.875 inches
Length 12 inches 8 inches
Junction Box 2.5 inches x 3 inches x 6 inches None

 

Sensor

Transmitter

Display 3.5 digit LCD indicator
Range 0-2, 0-20, 0-200, 0-2000 NTU switch-selectable
Input Model 977-C Sensor
Output 4-20mA into 500 ohms max. isolated; other outputs available
Resolution 0.05% of Full Scale
Repeatability Range-dependent 0.01 NTU
Accuracy 2% of Full Scale
Ambient Temperature 0-50C (32-120F)
Alarms Optional dual alarms
Enclosure NEMA 1 (standard) or NEMA 4X (optional)
Dimensions NEMA1: 11 inches wide x 6 inches high x 4 inches deep NEMA4X: 11.875 inches wide x 7.25 inches high x 6.75 inches deep
Mounting Panel or wall mount (NEMA 1) Wall or pipe mount (NEMA 4X)
Power 115 or 230 VAC @ 50/60 Hz, 5 Watts. Optional 12/24 VDC
Shipping Weight (complete unit) 16-24 pounds, depending on options

Pricing

All prices in US Dollars and do not include applicable taxes, shipping, duties and customs fees. Prices guaranteed through 2020. Please contact us for quantity discount and reseller information.

Typical Sensor Mounting