online measurements

The opportunities to measure in the production process directly differ from that in the laboratory. There are demands for a fast and easy measurement (e.g. to control a dryer) with a high accuracy. The measurements of the moisture should be worked out without additional weighing or density determination.

In this field the patented method of  Tews Elektronik shows a lot of advantages in comparisation with other methods. 

There are two different instruments for process control available. The MW 3260 with a planar sensor will be integrated into the production stream directly. The possibility to use different planar sensors leads to a higher accuracy of the measurement. The bypass system MW 3200 takes samples via a system of valves automatically for a batch measurement of the production stream. 

Bypass Microwave Moisture Measuring System MW 3200

The Bypass Microwave Moisture Measuring Systems are developed for an industrial production process. Moisture measuring under production conditions is easily realised for many applications due to the robust stainless steel cabinet and the simple operation. Based on the patented microwave measuring method a very accurate moisture measurement is achieved, independent of surface structure, density, and colour of the material will be reached. The Bypass Microwave Moisture Measuring System is well suited for a large range of applications in Chemistry, Pharmacy, Food and Feed Industry, Natural Products, Candy Industry and Bulding Material Industry.

Technical data

Measuring range: (0.1 – 85) % in adjustable graduations

Reproducibility: typical standard deviation 0.04 % for 10-fold measurement

Measuring time: approx. 5 measurements/min

Article memory: 20 articles

Data storage: CMOS memory with battery buffer

Features: analyser, measuring cabinet, KEAI-MWBridge

Sample temperature: (0 – 70) °C (automatic temperature compensation)

Ambient temperature: (0 – 40) °C

Protection: IP 54

Options (on request): density measurement, ex-protection, remote control panel

Interfaces

Data: 1 x RS 422 (for PC; PLC; process computer), 2 x RS 232

Analog output: 2x (0/4 – 20) mA (active, potential-free)

Analog input: 1x (0/4 – 20) mA

Control inputs: 8x optocoupler inputs, 24V, .g. for start, stop, article selection

Control outputs: 6x potential-free (230 V AC / 2A)

Mains connection: (110 – 230) V AC / (50 – 60) Hz / 70 VA

Dimensions and weights

System: desktop housing (410 x 460 x 210) mm (w x h x d) Weight: 19 kg

Measuring cabinet: stainless steel housing (420 x 400 x 255) mm (w x h x d), weight: 35 kg MW 3200 has a valve system for automatic filling for sensor 46