DIQ/S 181 - Universal Monitor

Digital single parameter measuring location for O2, pH/ORP, conductivity or turbidity
The system 181 – the digital and cost-efficient single parameter measuring point with proven IQ SENSOR NET technology and matching fixed cable sensors:

With its system 181, WTW offers a digital and cost-effective alternative to analog measuring points. For the parameters pH/ORP, conductivity, oxygen or turbidity, we offer our new IQ fixed cable sensors.

You will receive a cost-effective measuring point with proven WTW technology. In addition to the power supply via a wide range power supply (100-240VAC) or via 24 V, you will also have 2 power outputs and 3 relays at your disposal.

 Systems Controllers Comparison – 181, 282, 284 and 2020
 System 181 System 282 System 284 System 2020
 Max. Number of connectable sensors1248
 Max. Number of parallel measured parameters1*20**20**20**
 Output Signals

2 Analogue outputs,
3 Relays

Digital: None

Analogue outputs
(0/4-20mA), Relays

– RS 485
– Profibus DP
– Modbus RTU
– EtherNet/IP
– Modbus TCP

(digital and fieldbus parallel to analogue possible)

 Knowledge of special automation technology
Basically noneBascially none,
In PROFIBUS/Modbus systems yes
 Additional Options
 Additional displaysNoNoNoYes
 Redundant controllerNoNoNoYes
 Modem-capable Interface
(Fixed line Telephone)
Alarms and measured values
– MIQ/TC 2020 3G: via SMS and web browser
– MIQ/MC3 family: vie e-mail and web browser
 Radio ConnectionNoYesYesYes
  • Low-cost alternative to analog measuring points
  • Matching digital IQ fixed cable sensors for pH/ORP, conductivity, O2 and turbidity
  • Stable, robust and proven measuring technology
  • Display: Graphic display; resolution: 128 x 64 pixel; visible area: 72 x 40 mm (2.83 x 1.57 in.), black/white, backlit
  • Control Functions/Function Keys: 5 operating keys: 3 master keys for functions: measurement (M), calibration (C), set/system settings (S), 2 keys for: confirmation/switching menu O.K. (OK), escape (ESC), 2 knobs for rapid selection of software functions and input of alpha-numeric values (up), (down)
  • Cable Feeds: 4 screw cable glands M 16 x 1.5
  • Terminal Connections: Screw terminal strips, Terminal area for solid conductors: 0.2 … 4.0 mm2, Terminal area for flexible conductors: 0.2 … 2.5 mm2 accessible by opening cover
  • IQ Sensor Net Terminal Connections: Terminal connections for the IQ Sensor Net for connecting sensors
  • Electric Supply: 100 … 240 VAC (50/60 Hz), 24 V AC/DC
  • Ambient Conditions: Operating temperature: -4 °F … 131 °F (-20 °C … +55 °C); Storage temperature: -13 °F … 149 °F (-25 °C … +65 °C)
  • Housing Material: PC – 20 % GF (polycarbonate with 20 % fiberglass)
  • Protection Rating: IP 66 / corresponding to NEMA 4X (not for direct conduit connections). Conduits need to be connected with flexible adapters (CC-Box), respectively with adapters CC-PM..
  • Dimensions (W x H x D): 144 x 144 x 95 mm (5.67 x 5.67 x 3.74 in.)
  • Weight: Approx. 2.2 pounds (1 kg)
  • Certifications: ETL, cETL (conforms with relevant UL and Canadian standards), CE
  • Electromagnetic Compatibility: EN 61326-1, Emission: Class B, FCC Class A
  • Integrated Overvoltage Protection: According to EN 61326-1 enhanced overvoltage protection for the entire system
  • Connection Characteristics: Energy- and Data transfer via two wire technique, integrated EMC shield control
  • Warranty: 3 years for defects of quality