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What Are Tiltmeters And Where Are They Used?

Writer's picture: encardioriteencardiorite

Have you ever wondered how geologists get to know if the volcano is about to erupt or not or whether a building is about to fall or not? Well, all of this is measured using a geotechnical monitoring instrument known as tiltmeters.


Tiltmeters are a type of inclinometer that continuously monitor even the minor rotation, deflection, & deformation of retaining walls, diaphragms, volcanoes, dams, landslides etc. Beam Sensor, on the other hand, is similar to an El tiltmeter, designed to monitor differential movement and tilting of structures.


Here we will explain more about tiltmeters and beam sensors along with their different types and how they are used in the field of geotechnical monitoring.


What Are the Different Types of Tiltmeters?


Encardio-Rite deals with some of the most reliable, portable, low-cost, robust, and precisely-made tiltmeter sensors. The varied Models of tiltmeter include:


  • EL Tiltmeter & EL Beam Sensor

  • Tiltmeter with automatic data logger

  • Box-type Tiltmeter with SDI-12 Interface

  • MEMS Beam Sensor (MEMS)

  • Box-type tiltmeter with MEMS Beam Sensor (MEMS)

  • Portable Tiltmeter (MEMS)

  • Uniaxial/Biaxial Tiltmeter (MEMS)

  • Wireless Tiltmeter (MEMS)

Let us now discuss all the types of tiltmeters in detail with their construction, as well as operating principles.


EL Tiltmeter & EL Beam Sensor



The EL tiltmeters contain an electrolytic tilt sensor housed in a compact, rugged, and weatherproof enclosure. Encardio-rite’s Model EAN-31EL EL tilt sensor is designed for measuring very small tilts, of the order of half a degree, with a high resolution.


It is used to monitor rotation and deflection of structures such as buildings, retaining walls etc. in a vertical plane. These are normally used as a stand-alone unit for measuring tilt.


There are two ways in which the tilt sensor is used to measure the amount of tilt. One of them is by directly attaching it to the structure using suitable mounting brackets or fixed to horizontal or vertical beams.


The Model EAN-31EL-B beam sensor consists of the Model EAN-30EL, electrolytic tilt sensor mounted on a beam of fixed gage length and suitable mounting hardware for securing the beams to the structure.


The beam sensors are commonly linked together to give a differential displacement profile. An array of linked beam sensors allows the vertical settlement profile along the array line to be determined.


The Model EAN-41EL-B tiltmeter is designed to monitor inclination and vertical rotation of structures. It is a high-resolution tilt sensor and rugged in construction. The electrolytic tiltmeter is contained inside a 1, 2 or 3 m long beam. The Model EDI-53ELV read-out logger is used to read voltage output from the sensor. The output can also be monitored or recorded at any remote location by an automatic data acquisition system or automatic data loggers.


Tiltmeter with Automatic Data Logger


The Model ESDL-30MT tiltmeter consists of a uniaxial or biaxial MEMS tilt sensor mounted inside an automatic SDI-12 digital interface data logger. It is a complete unit in itself that monitors tilt at any location.


The tiltmeter features a wide operating temperature range, dependable stand-alone operation, low power consumption, compatibility with many telecommunication options and flexibility to support a variety of measurement and control applications.


All the measured data is stored together with the current date, time, battery voltage and, a data record in the internal non-volatile memory of the data logger which is transferable to a remote server/PC through GSM/GPRS service.


Box-type Tiltmeter with SDI-12 Interface


The Encardio-rite Model EAN-91M/EAN-93M box type tiltmeters are suitable for monitoring minor changes in the inclination and vertical rotation of structures. The tiltmeters provide a relatively low-cost system which offers excellent resolution and long term stability.


The Model EAN-91M/93M tiltmeter can be directly fixed on a wall/structure. One can also the EAN-91M tiltmeter to a beam of length 1 m, 2 m, and 3 m and use it as a beam sensor for monitoring differential movement and rotation in structures.


It is also used for monitoring deflection and deformation of retaining walls. EAN-91M beam sensor can be mounted both vertically and horizontally. The individual beam sensors can be linked together to give a ...[Continue Reading]

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