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19K photo of turbidimeter The Turbidimeter Model 977-C is an innovative turbidimeter which utilizes an insertion-type sensor. A submersible sensor is available for open channel applications. Since the sensor can be inserted in any size pipe, costly by-pass systems are not required. The design eliminates the effects of fluid color. In-situ measurements provide instantaneous accurate readings and a choice of isolated linear outputs is supplied as standard. A 4-position calibrated range dial allows for the selection of four NTU ranges.

The Model 977-C Turbidimeter uses a pre-focused incandescent lamp to direct a beam of light through the process fluid. Particulate matter in the fluid scatters light in proportion to particulate concentration. The scattered light is detected by a silicon detector which generates a current signal proportional to the particulate concentration. The electronic signal converter amplifies and scales the current signal to provide a linear readout on a digital meter plus an isolated output signal.

977-C Installation Manual (PDF, 262KB)

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Typical Sensor Mounting

25K drawing of sensor mounting

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Specifications

Download Print-Ready Spec Sheet (PDF, 231K)

SENSOR

Type Insertion Probe Submersible Probe
Size Pipes greater than 2 inches Open channel/tanks
Wetted Parts 316 Stainless, glass 316 Stainless, glass
Process Temp. -10oC to 110oC -10oC to 60oC
Pressure 0 to 150 psig 0 to 50 psig(110 feet of water)
Mounting 1" NPT male Cable or rigid mount
Diameter 7/8" 7/8"
Length 12" 8"
Junction Box 2 X 4 X 2" None

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 4-20 mA into 600 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 0oC to 50oC
Alarms Optional Dual Alarms
Enclosure NEMA 1 or NEMA 4X
Dimensions (NEMA 1)
(NEMA 4X)
11" W x 6" H x 4" D
11-7/8" W x 7-1/4" H x 6-3/4" D
Mounting (NEMA 1)
(NEMA 4X)
Panel or wall mount
Wall or pipe mount
Power 115 or 230 VAC @ 50/60 Hz, 20 Watts. Optional 12 & 24 VDC etc.
Shipping Weight 16-24 lbs. Depending on Options

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Pricing

PART# ITEM DESCRIPTION Price
US Dollars
977C000 977-C Turbidimeter/ Low Suspended Solids Monitor $2,290.00
977C600 12 VDC Power 12 VDC powered transmitter option for 977-C $236.00
977C601 24 VDC Power 24 VDC powered transmitter option for 977-C $290.00
977C900 Cable Extra interconnecting cable for 977-C $1.60
977C300 Dual Alarms Dual alarm option for 977-C $325.00
977C500 Light Shield Light shield option for 977-C $236.00
977C100 Nema 4X Nema 4X enclosure option for 977-C $309.00
977C200 Pipe Insertion Adapter Pipe insertion/removal adapter option for 977-C $325.00
977C400 Submersible Sensor Submersible-type sensor option for 977-C $189.00

Price list for all instruments (PDF, 200KB)
Information on export fees

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