20 Water/Wastewater
Level Switches for Water and Oils
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Precise Water Analysis in High-Quality Design
The MD 100 from Tintometer (Germany) uses high quality interference filters with long- life LEDs as a light source without any moving parts in a transparency sample chamber. The units supply accurate, reproducible results very quickly. Other major advantages include ease of operation, ergonomic design, compact dimensions and safe handling. The calibration and software-based adjustment options mean that the MD 100 is also suitable for use as a testing instrument. The tests are conducted using either Lovibond®
tablet reagents with long-term stability and a
guaranteed minimum 5 or 10 year shelf life, VARIO powder reagents or using liquid reagents.
The WATCHDOG Minimelder/Maximelder-R from AFRISO (Germany) is a level switch designed to signal minimum or maximum levels of water, heating oil EL, L, M, oil/water mixtures and neutral, non-viscous and non-adhesive liquids in tanks. Minimelder/Maximelder-R consists of a control unit and a probe connected by means of a signal cable up to a distance of 50m. The control unit contains the following elements in an impact- resistant plastic housing: the display elements and controls as well as all electronic components for signal processing and conversion of the probe signal which is then available as a voltage-free relay contact (normally open contact) to be used by, for example, an alarm unit or an event reporting system.
The device is supplied with AC 230 V and suitable for ambient temperatures of -5°C to +55°C. The probe is designed for a temperature of the medium from -5°C to +50°C and consists of a float switch in which a moving magnet switches a contact. The factory setting of the magnet causes the unit to switch either when the probe is immersed or not immersed. WATCHDOG Minimelder-R: The probe is mounted in the bottom area of the tank and generates an alarm signal when the liquid level falls and the probe is no longer immersed in the liquid. WATCHDOG Maximelder-R: The probe is mounted in the top area of the tank and generates an alarm signal when the liquid level rises and the probe is longer immersed in the liquid. Available accessories include a seal kit (IP 54) and a mounting frame.
Reader Reply Card no 55 Scroll Memory (SM)
To avoid unnecessary scrolling for the required test method, the instrument memorises the last method used before switching off the instrument. When the instrument is switched on again, the scroll list comes up with the last used test method first.
Zero Setting (OTZ)
For certain versions of the instrument it is not necessary to zero the instrument each time. The zero setting is held in memory (One Time Zero - OTZ). The zero setting can be confirmed whenever it is useful.
Reader Reply Card no 54 New Water and Food Analytics Catalogue
Merck (Germany’s) Water and Food Analytics Catalog has been fully updated to include details of our entire global product range which extends to over 450 products.
As well as full product specifications, the Catalog offers an A – Z overview to help you determine the most appropriate test for a given requirement, together with a list of test applications for each product.
Improving quality of life
Across the world, producers of food and drinks rely on Merck testing and environmental analysis products to ensure the highest processing and production standards – and, in turn, living conditions.
Full product range
The comprehensive range gives you flexibility and choice in a multitude of testing environments including food, water and wastewater analysis to spectrophotometry and quality control.
Reader Reply Card no 56 New Tide Gauge Promises High Performance & Low Cost
Valeport (UK) announces the launch of TideMaster, a compact Water Level Recorder, designed for use in a wide range of fixed or portable survey and tide monitoring operations. Suitable for use in fresh or salt water, the TideMaster is highly accurate and can be deployed for up to a year at a time.
Sales Manager, Kevin Edwards, commented, “TideMaster is an extremely versatile and cost effective new product. It replaces the popular Model 740 and whilst it retains the easy to use features of the Model 740, a lot more enhancements have been made with further provision for additions in the future”.
Low power consumption, with both pre-programmed and a user selectable sampling regime, allow for up to a year of autonomous operation, whilst optional telemetry packages provide capabilities for real time operation. As well as recording water level, TideMaster can be provided with an optional ultrasonic wind speed and direction sensor to record meteorological data.
TideMaster can be set up and data retrieved via an optional control/display panel that uses OLED technology, Bluetooth and an SD memory card. Alternatively, it can be plugged into a PC and controlled using Valeport’s Windows based software, TideMaster Express. This allows the user to download and display recorded or real time data from single or multiple gauges. TideMaster is also compatible with a wide range of Hydrographic software and tools on the market.
Reader Reply Card no 57 Reader Reply Card no 58
AET
August/September 2010
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