Universal measuring transmitter IQ SENSOR NET System 281


Design according to the minimum requirements for measuring instruments used at 
waste water treatment plants defined by DWA in bulletin M256. 

Universal measuring transmitter to connect 1 IQ sensor;
with integrated wide range power supply unit, controller and control unit;
with 1 analog output, 2 relays and HART

Equipped with the following features:
- Control unit for the quick selection of software functions
- With illuminated graphic display
- With integrated controller function
- Input voltage 100 - 240 VAC 50/60 Hz
- HART
- 1 analog output via HART module (0/4 ... 20 mA)
- 2 freely programmable relay outputs (250 VAC/2 A or 24 VDC/2 A) that can be assigned arbitrarily; potential free
- with 1 IQ Sensor Net connection
- Error behavior according to Namur NE43
- High EMC interference immunity 
- Integrated lightning protection
- with USB interface for software updates

Measured parameters:
pH/ORP or D.O. or conductivity, turbidity, TSS and sludge level; Temperature as secondary parameter

System communication:
Digital transmission technique

Enclosure material:
PC - 20 % GF (polycarbonate with 20 % glass fibre)

Dimensions:
144 x 144 x 125 mm (W x H x D)

Temperature range:
Operating range: -20  C ... 55  C
Storing range: -25  C ... 65  C

Instrument protection:
IP 67 type of protection

Protective class / overvoltage category:
II / II

Test certificates:
CE

Manufacturer:
WTW

Type:
DIQ/S 281-HART
or equivalent