This stands for Micro Electronic Measurement System. In the Geosense range of Tilt measuring products, this technology has superseded the Servo-Accelerometer technology (in particular relation to Tiltmeters, it was also referred to Electro-levels). This provides a much more stable and robust product and at a more competitive rate. All Geosense Tilt range products are MEMS technology.
Multiple sensors can be connected to one string
RS485 signal has a maximum distance of 1200 meters in a continuous line that is properly terminated. Provided that a suitable cable is used and there is not a large distance between the first sensor in the string and the datalogger location, then you should be able to successfully connect up to 250no. sensors in one string. This may also require the need of an RS485 Booster interface.
Of course this would not be advisable as should there be a failure at one sensor, it could potentially affect the readings of the entire string. It would be best to split into as many strings as conveniently possible to cover any possible failures that may occur.
Fully EMC Compliant
Our Tiltmeters have been manufactured to meet the Electromagnetic Compatibility Directive 2004/108/EC, to ensure there is no chance of being affected by electrical noise on any site. When a cable is being routed from each sensor there are specific requirements that need to be met with regards to the type of cable and how it is terminated. Geosense provide a Low Smoke Halogen Free cable with a braid with all Tiltmeters, Tiltbeams and In-Place Inclinometers. When the cable needs to be spliced it is important to contact Geosense to supply an EMC splice kit which will ensure the EMC compliance is throughout the cable route.
Geosense has a wide range of Wireless options available which are all part of the Wi-SOS family of products. Our Tiltmeters are compatible with many of these models depending on the arrangement that is required of them. Here are some typical arrangements and which WI-SOS model and Tilt variation would be best to use:
- Standalone Tiltmeter with limited or no access to it = 4-20mA Tiltmeter w/ WI-SOS 100.
- Array of Tiltmeters within a radius of 800m with good line of sight = 4-20mA Tiltmeter with WI-SOS 400 nodes for each Tiltmeter and Gateway in central location.
- String of bussed In-Place Inclinometers with limited or no access to the borehole location = WI-SOS 300 sending signal to central Geologger location.
Please contact a member of the Geosense Technical Sales Team to discuss your requirements and to ensure the best solution is chosen.