Pyxis 50626, User Manual

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1 Introduction
The Pyxis ST-730 Series sensor a pre-scaled inline sensor that measures turbidity in water using a white LED
as the excitation light source and by measuring the scattered light at a 90-degree angle with respect to the
excitation beam. The fluidic and optical arrangement of the ST-730 Series sensor is designed to overcome
many shortcomings associated with other inline turbidimeters. It can be easily inserted into the custom-
made tee with a compression fitting port designed to ensure correct vertical positioning of the ST-730 Series
sensor in the fluid stream. The ST-730 Series sensor custom mounting tee has two ¾ inch female NPT ports
for plumbing into an existing ¾ inch sample water line. The ST-730 Series sensor can be connected to any
device that accepts an isolated or non-isolated 4–20mA input or RS-485 Modbus input. The ST-730 Series
sensor has a short fluidic channel that can be easily cleaned and calibrated using the MA-WB Bluetooth
adapter and
uPyxis® Mobile or Desktop App.
2 Specifications
Table 1. ST-730, ST-730B, ST-731, and ST-735 Specifications
Specifications
*
ST-730 ST-730B ST-731 ST-735
Part Number (P/N) 53201 53202 53505 53204
Turbidity Range 0–100 NTU 0–1,000 NTU 0–10 NTU 0–10,000 NTU
Turbidity
Resolution
0.1 NTU 1 NTU 0.05 NTU 10 NTU
Turbidity Accuracy ±2% of reading
Method Nephelometric, with white LED and IR LED (860 nm) light sources
Calibration Two-point calibration against standard solution
Outputs 4–20mA Analog Output, RS-485 Digital Output with Modbus protocol
Installation Custom tee assembly (P/N: ST-001) with 3/4” FNPT socket & threaded ports
Cable Length 5 ft, with IP67 connectors. 30 ft and 60 ft extension cables available
Power Supply 22–26 VDC, 1 W
Dimension (L
×
Dia) 6.8
×
1.44 inch (172.7
×
36.6 mm)
Weight 0.37 lbs (170 g)
Material CPVC
Operational
Temperature
40–120 °F (4–49 °C)
Storage
Temperature
20–150 °F (-7–66 °C)
Pressure Up to 100 psi (0.7 MPa)
Enclosure Rating IP66
Regulation CE
*
With Pyxis’s continuous improvement policy, these specifications are subject to change without notice.
ST-730 Series User Manual service@pyxis-lab.com | +1 (866) 203-8397 2