SuSix® Suspended Solids & Turbidity Transmitter

MJK SuSix® turbidity and suspended solids sensors are designed for measurement by immersing the sensor into open tanks or in-line pipe mounting. The SuSix® transmitter is rugged and designed to handle tough applications. The patented six scratch-proof sapphire optics produce class leading accuracy. 

MJK SuSix provides accurate data allowing you to control the amount of active solids in the process tank, thereby obtaining the optimal environment for the biology process.


Application Photos
  • Optical windows made of scratch resistant glass 
  • Mechanical cleaning system 
  • Acid resistant, polished steel sensor with a chrome dioxide coating 
  • Six optical windows, with patented measurement system, SuSix measure turbidity in pure water and solids and any thicker liquid, in one sensor 
  • Measure in accordance with ISO 7027 standards 
  • SuSix is delivered providing 4-20 mA or MODBUS RS485 output 
  • Easy installation and full range of fitting available 
  • SuSix display holds a built-in data logger 
  • No calibration needed for turbidity, typically only one calibration point needed for active sludge 

Turbidity: 0.001 – 9999 FNU/NTU 1)
Suspended solids: 0.001 – 400 g/l (SiO2)
Measurement principle: Infrared-diode system and beam focusing (l = 860 nm)
Turbidity: Two-channel-90° scattered light measuring corresponding to DIN/EN 27027/ISO7027, Additional verification by six-channel multi-angle measuring
Suspended solids: Six-channel, multi-angle with modified absorption, 2 channels are used for absorption
Materials: Head: Stainless steel DIN 1.4460 — Body: Stainless steel DIN 1.4435, Optical lenses: Sapphire — O-ring: Viton, Wiper (optional): PA (GF), TPU — Cable: PUR
Cable: 3 x 2 x 0.34 mm2, outer diameter Ø 8.3 mm
Cable length: 10 m (customized lengths, optional 2)
Response time: 1 second
Flow velocity: No limit
Power supply: 24 V DC (15-30 V DC)
Current consumption: Approx. 45 mA
Output: RS 485, 9600 baud, 2-wire
Accuracy (turbidity): Better than 3% of actual concentration
Accuracy (susp. solids): Better than 5% of actual concentration (depends on calibration and media)
Temperature range: 0 – 60 ºC — short term to 80 ºC — with wiper 0 to 50 ºC
Enclosure rating: IP 68 to IEC 529 (10 m) / 10 bar pipe mounted, NEMA 6x
Weight: 1,3 kg
Approvals CE: EN61010-1, EN61326-1 — ATEX: Ex II 3G

  • Accuracy: +/- 0,1% of reading
  • Measuring input: RS-485
  • Fitting: Compact / Wall 
  • Housing: Fibreglass-reinforced polycarbonate
  • Digital outputs: One voltage-free electromechanical relay (max. 50 V DC / 1 A), One optically isolated MOSFET relay (max. 50 VAC / V DC / 120 mA)
  • Analogue output: One active 4 – 20 mA, galvanically isolated (max. load 800 W)
  • Communication: MODBUS® RTU-mode, 9600 baud, 2-wire RS-485, slave-mode
  • Built-in data logger: 360,000 logs and graph view
  • Power supply: 230 V AC, 50 / 60 Hz ± 10 % or 115 V AC, 50 / 60 Hz ± 10 % or 10 – 30 V DC, or 24 V AC, 50 / 60 Hz ± 10 %
  • Enclosure rating: IP 67, NEMA 4x
  • Temperature range: -20… 60°C
  • Weight: 1.1 kg
  • Remote display: Up to 1,000 m 
  • CE Approvals: EN 61000-6:2001, EN 61000-6-2:2001