Switches Indicators & Gauges

Foam Detect and Level Monitor, otherwise known as Charis, have been designed and distributed across Australia by Semrad Pty Ltd since 1994.

Foam Detect and Level Monitor created by Semrad Pty Ltd are designed uniquely for foam (Please note that some other manufactures simply modify liquid sensors. These sensors will not be as effective)

One of the main problems that can occur with Foam Detect and Level Monitors is that they foul due to a buildup of sticky covering on the sensor. Semrad Pty Ltd have overcome this problem in their design by installing an individual IMA Sensing® technology which prevents the sensors from fouling even when there is a buildup of foam and product.

Foam Detect and Level Monitor can be used with biotech, food, sugar, brewing, wastewater, effluent treatment and chemicals. They have a high accuracy rate and a high pressure and temperature range.

Submersible Level Transmitter

Semrad Pty Ltd distributes the NivoPress submersible hydrostatic level transmitter in Australia, along with various level switches such as the Nivofloat and NivoMag, level transmitters including EchoTrek and LabkoMax, foam controllers, safety systems, displays and process controllers.

The NivoPress is a two-wire level transmitter consisting of a probe and a special breathing cable containing a capillary pipe and a stress resistant inlet. The probe consists of a stainless steel cartridge with a membrane at the end. It works by measuring the pressure difference between the hydrostatic pressure of the liquid head above the probe and the actual atmospheric pressure. This is then converted into a 4 to 20mA output signal. The cable material is polyurethane.

The device can operate between temperatures of -10° to +60°C, with a linearity of <0.2%. It features a range of up to 200 metres, reverse polarity protection, accuracy of 0.5% and optional lightning protection.

Applications

This submersible hydrostatic level transmitter can be applied to clean or faintly chemically contaminated liquids in boreholes, open reservoirs and tanks. It is easy to install in existing facilities and is especially recommended for monitoring and controlling submersible pumps.

Level Transmitters

A level transmitter is an electronic device that converts level measurements from a sensor to a display for a user. They can measure the level of both liquids or solids within a defined space or container (water tank, oil drum, etc), sending the data via a signal to a receiver. The receiver can be either a computer-controlled device or to a display for a user to read.

The term ‘hydrostatic’ refers to the pressure that fluids exert or transmit. So a hydrostatic sensor will measure the increase in hydrostatic pressure resulting from the increasing height of the liquid. A displaced electrical charge will accumulate, generating an output signal. Applications include measuring levels in groundwater, deep wells, water towers, rivers, sewage treatment plants and so on.

Hydrostatic Level Transmitter

Semrad Pty Ltd, distributor of high quality industrial level sensors, gauges, switches and transmitters, is dedicated to providing cost effective and technically advanced solutions for measuring and controlling liquid and bulksolid levels. Their products are specifically designed to perform accurately and reliably in a range of environments, including caustic, hazardous, non-contact and invasive configurations. Their years of experience have included thousands of installations worldwide in a range of industries from chemical to wastewater, mining, beverage, electronic, material handling, agriculture, textile, pharmaceutical, medical and environmental.

Semrad’s NivoPress NT-100 is a two-wire hydrostatic level transmitter that can be used in applications from liquids and masses in tanks and vessels to chemicals with dense vapour or gas layers above the surface, foaming liquids, and viscous or corrosive materials. It is controlled by a microprocessor to measure the pressure difference between the hydrostatic pressure of the liquid head above the sensor and the actual atmospheric pressure. The changes in pressure are converted into a 4-20 mA output signal. It features a ceramic diaphragm, scalable analogue output, programmable damping, secondary lightning protection, high overload capability, high accuracy (<0.2%), and a process temperature range of -30° to +100°C. The probe material is made of stainless steel, takes a power supply between 12 – 30V DC, and 8 ranges starting at 0.1 bar.