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)
| 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 |
| 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