LEVEL-CAP
Capacitive level sensor for high temperatures and hot melt
The LEVEL-CAP sensor is a level measurer for liquid, granular or powdery materials and is able to take measures in high temperature conditions (up to 200°C or 392 °F).
It can be used for granulars, dust or liquids, both electrically conductive (ex. water) and insulators such as oil and hot melt materials (hot-melt glue).
The LEVEL-CAP sensor is made of 2 parts:
- CAP-SENSOR level probe which needs to be placed on the tank of the product that needs to be measured
- CAP-LOGIC logic board which controls the signal coming from the CAP-SENSOR and sends it to the digital (potential-free contact relay), analog (can be selected in the 0-10V or 0-20mA modes) or serial (used by the granular adhesive charger Easy-charge) output.
The CAP-SENSOR signals the level by measuring the capacity that is created between the accurate electrode and the ones used as refererence:
- In case of granules, powders or electrically insulating liquids, the reference electrode can be the wall of the tank on which the CAP-SENSOR is installed (in this case the tank has to be made of a metallic or electrally condictive material; in case of non-conductive tanks, a metal reference electrode is required to be installed a few centimeters apart from the CAP-SENSOR one)
- In case of granular, powdery or electrically conductive materials, it’s the material itself which level has to be measured that serves as reference electrode as long as there is a connection between the reference of the CAP-SENSOR and the material. In this case, the PTFE insulator for CAP-SENSOR cod.LEX-xxCMPT is required (where xx is the length of the sensor expressed in centimeters), to prevent the sensor from going in short circuit from the material itself, which would prevent it from functioning correctly.
The microprocessor technology used by the LEVEL-CAP make it extremely easy to program, which is made through self-scan of the minimum level (and maximum level if required).
To complete the parameters to program, there is also the hysteresis, which allows you to set the range of level difference needed to invert the digital output (minimum level alarm relay) and to signal to the Easy-charge charger the need to recharge the tank.
CAP-SENSOR probes
The CAP- SENSOR/EX consists of a main unit which is about 82 mm (3.23 in).
The length of the electrode is custom thanks to the original modular system composed of 50 and 100mm extensions each: so lengths multiple of 50mm can be ordered.
Even custom sensors can be supplied on requests:
- Sensors of custom lengths.
- Sensors with PTFE insulation of the electrode, For jobs that use electrically conductive or chimically aggresive substances.
- Circular connector sensors, to be used in special circumstances (ex. for fast removal from the paired tank or to extend the connection cable).
The CAP- SENSOR/125 has a 125 mm electrod by default, completely insulated with PTFE to be used in jobs with electrically conductive substances (ex. cold glue)
The LEVEL-CAP can easily interact and is easy to connect with already existent systems thanks to the CAP-LOGIC board’s outputs made for different needs:
- Low level output with potential-free NC/NO relay
- Analog parametrizeable 0-10V / 0-20mA output, proportional to the level
- Serial output current-loop for interfacing with specific systems (ex. EASY-CHARGE charger)
The CAP-LOGIC conditioning board is available in the following models:
- CAP-LOGIC/EC: board equipped with a direct output for the granular adhesive charger Easy-charge. This output also exists in the other models
- CAP-LOGIC/xx/RL: this board is equipped with a potential-free relay output with NC/NO contact. xx indicates the board powering voltage (24Vdc or 230Vac)
- CAP-LOGIC/xx/RL-AN: this board is equipped with a potential-free relay output with NC/NO contact and analog output. xx indicates the board powering voltage (24Vdc or 230Vac)
LEVEL-CAP is also available in a variation which can be paired with the granular adhesive charger EASY-CHARGE(cod. LEVEL-CAP/ECR) through the logic board located in a circular plastic container and equipped with charge button and silk-screen panel as shown in the following picture.
This version was purposely built to be installed directly on the supply hopper, making the system more compact and easy to install.
An alternative to the LEVEL-CAP/ECR version is the LEVEL-CAP/EC model enclosed in a rectangular plastic container equipped with charge button and silk-screen panel as shown in the imagine on the side.
The LEVEL-CAP/EC was made to bbe installed on the granular adhesive transferring tube with some plastic ties.
This version is supplied for systems in which it’s possible to install the LEVEL-CAP/ECR module for vertical encumber reasons.
LEVEL-CAP is programmable through the CAP-SETUP software, given by Emmeci Elettronica, and the CBL-LEVELCAP serial connection cable, which allows you to modify the output switching time, the level of measure/speed accuracy, the minimum and maximum value of the analog output and also allows you to test the sensor’s functioning.
