Universal monitor DIQ/S 281. The new system 281 – the digital and cost-efficient single parameter measuring point with proven IQ Sensor Net technology and IQ sensors for the standard parameters. Low-cost alternative to analog measuring points
The System 281 combines the known performance of analog products with the advantages of the digital IQ Sensor Net:
- Proven and reliable IQ Sensor Net technology
- 100 % IQ Sensor Net look & feel
- Versions with analog outputs, Modbus RTU and HART available
- 2 relays for alarm for main and secondary value
- You can easily upgrade to DIQ/S 282/284, since IQ sensors can be retained
- Free software updates with new features
- Stable, robust and proven measuring technology
Measurement Parameters:
Matching digital IQ sensors for pH/ORP, conductivity, D.O., turbidity, suspended solids and sludge level (also as seawater version for corrosive media)
Models:
DIQ/S 281-CR2 with power supply via a wide range power supply unit (100-240VAC), 2 analog outputs (0/4-20 mA) and 2 relays
DIQ/S 281-CR2/24V with 24V power supply, 2 analog outputs (0/4-20 mA) and 2 relays
DIQ/S 281-MOD with a wide-range power supply unit (100-240VAC), MODBUS interface (RS 485) and 2 relays
DIQ/S 281-HART with a wide-range power supply unit (100-240VAC) and 2 relays
Made for many applications:
Once developed for wastewater the IQ Sensor Net is also successfully applied in drinking water applications and the process industry for many years. Try it yourself! Some examples:
- With SensoLyt® 700 IQ for different pH ranges in drinking water
- With VisoTurb® 700 IQ, the turbidity sensor with ultrasonic cleaning in the wwtp outlet
- With the calibration free dissolved oxygen sensor FDO® 700 IQ in the aeration basin
- With TetraCon® 700 IQ, the 4 electrode conductivity cell in the process industry
- With the suspended solids sensor ViSolid® 700 IQ with ultrasonic cleaning in the aeration basin of a wwtp with industrial wastewater
- With IFL 700 IQ, the ultrasonic sensor for detailed presentation of sludge profile in the post-sedimentation
| Controller | DIQ/S 281-CR2 | DIQ/S 281-CR2/24V | DIQ/S 281-MOD | DIQ/S 281-HART |
| Order No. | 472103 | 472104 | 472105 | 472106 |
| detailed technical data see data sheet D1.09 | ||||
| Max. number of sensors | 1 | |||
| Connectable sensors | IQ sensors for pH/ORP, O2, conductivity, turbidity, TSS or sludge level | |||
| Communication | 2 x (0) 4–20 mA2 x relays | Modbus RTU 2 x relays |
HART 2 x relays |
|
| Cable length sensor | 100 m fixed cable | |||
| Max. total cable length | 250 m | |||
| Power supply | Wide range mains converter (100-240VAC) | 24V | Wide range mains converter (100-240VAC) | |
| Connectable modules | DIQ/CHV (Cleaning Head Valve), DIQ/JB and MIQ/WL PS SET | |||
Case Studies
Municipal Wastewater Treatment · WTW — Stock Configuration Case
Customer Profile
The typical setting in Municipal Wastewater Treatment is the inlet, biological and outlet stages of a municipal plant. The measuring point is WTW; the focus is covering online and laboratory water analysis with WTW instruments.
Key Difficulties
Conditions are high solids and corrosive fractions, with large diurnal flow swings and, on top of that, effluent parameters drift and probes foul with sludge and biofilm, which a standard configuration cannot handle for long. The design therefore starts with selected by parameter set, range and digital sensor protocol.
Implementation
The scope ran through the stock channel: configuring from stock and delivered quickly. Technically it hinges on selected by parameter set, range and digital sensor protocol, and on these requirements: stable compliance with Grade 1A discharge limits and online data reporting.
Customer Benefit
In practice this means plug-and-play digital sensors that keep calibration when swapped, which cut the workload on the site maintenance team.
Food & Beverage · WTW — Stock Configuration Case
Project Background
The project covers dosing, pasteurising, filling and CIP stages. The work centres on WTW and the core task is covering online and laboratory water analysis with WTW instruments.
Operating Challenges
The medium and duty are characterised by syrups, dairy and beverages that scale easily, under strict hygienic requirements, and frequent cleaning demands instruments that withstand hot CIP/SIP caustic cycles. So WTW cannot be specified generically — it calls for selected by parameter set, range and digital sensor protocol.
Solution
The Ainstru engineering team worked through the stock channel: configuring from stock and delivered quickly. The configuration involves selected by parameter set, range and digital sensor protocol, with these requirements in view: food-safety and hygienic design per 3-A / EHEDG.
Results
Since start-up the system has run steadily; the practical result is plug-and-play digital sensors that keep calibration when swapped.
Chemical & Pharmaceutical · WTW — Stock Configuration Case
Project Overview
The site is reactors, metering vessels and finished-product tanks. The customer wanted WTW properly configured on the existing plant, with the aim of covering online and laboratory water analysis with WTW instruments.
Technical Challenges
What actually causes trouble is highly corrosive media with solvents and crystallisation, partly in explosive atmospheres, and corrosion plus Ex protection shortens instrument life and makes downtime costly. All of this means the WTW configuration has to involve selected by parameter set, range and digital sensor protocol.
Configuration
Supply and installation were organised through the stock channel: configuring from stock and delivered quickly. On site this meant selected by parameter set, range and digital sensor protocol, checked line by line against: Ex certification and GMP traceability of records.
Performance
After commissioning the outcome is plug-and-play digital sensors that keep calibration when swapped, and the readings are now used for process tuning.
Power & Energy · WTW — Stock Configuration Case
Site Conditions
This is a Power & Energy customer whose plant is at boiler feedwater, turbine condensate and FGD/DeNOx systems. The main task was covering online and laboratory water analysis with WTW instruments.
The Problem
The difficulty lies in high temperature and pressure with both steam and saline water; at the same time drift under high temperature and pressure, with very costly unplanned outages. Specification therefore means selected by parameter set, range and digital sensor protocol.
What We Did
We took a stock channel approach — configuring from stock and delivered quickly. Delivery was built around selected by parameter set, range and digital sensor protocol, with point-by-point checks on: compliance with power-industry codes and unit availability targets.
Operating Outcome
In service the system performs as intended — plug-and-play digital sensors that keep calibration when swapped, with routine maintenance falling noticeably.
