GM-115-EM15
Cleaning agent moisture meter Top model
This product has most of the features needed for moisture measurement.
● Temperature correction / conductivity correction
● Upper / lower limit relay contacts and analog output
● Simple dirt detection ※1
● Digital moisture display after correction(wt%)
● Scale over display（LED lighting）
● Scale over output（NPN open collector）
GM-115
Simple cleaning liquid moisture meter With dirt detection function
It measures the water content and conductivity at the same time, and presents monitoring information on the degree of contamination of the liquid (the degree of mixing of flux, sludge, etc.).
● Reasonable price
● Simple dirt detection ※1
● Digital voltage output without temperature correction
※You have to convert the voltage output to a moisture value.
● Analog output
● Scale over display（LED lighting）
● Scale over output（NPN open collector））
※1：Dirt detection：It is effective when dirt is a conductive substance such as flux.
When monitoring the degree of contamination, it is premised that the water content of the cleaning agent is controlled by the output signal so that it is constant.
Features
●Easy to handle
Real-time measurement is possible online.
●Just immerse the sensor in the liquid
Moisture measurement and moisture control can be performed immediately.
●More accurate moisture measurement
Dirt and temperature changes are dealt with by measuring conductivity and temperature and performing correction calculations.
●Enhanced resistance to harsh temperature environments
We customize the moisture meter according to the measurement situation in your factory.
Application
Regarding the installation of the sensor
- You must keep the sensor immersed in the cleaning agent at all times.
- You must keep the state there is no air bubbles around the sensor because it affects the measurement accuracy.
- Install in a place where there is not much cleaning dirt.We recommend installing after the cleaning-dirt removal device.
- You must keep the sludge from sticking inside the electrodes.
- If the temperature of the cleaning agent changes significantly during measurement, it is recommended to measure with a product that has a temperature compensation function.
- We recommend that you install the sensor vertically on a sub-tank because it is easier to calibrate and maintenance can be performed even during operation.
Regarding the moisture adjustment
- Moisture adjustment should be done in the sub tank for optimum mixing with the cleaning agent.
- If the difference in specific gravity between the cleaning agent and water is large, or if the amount of circulation by the pump is small, excessive water supply may occur.It is recommended to adjust the water content gradually by reducing the flow rate.
Performance
Actual correction calculation in moisture measurement
The measured value changes depending on the conductivity of the object to be measured. If only the measured value is calculated and presented as the water content, a large error will occur between the presented value and the actual water content.
This product reduces the error by measuring the capacitance and conductivity at the same time and correcting the conductivity.
And since the permittivity depends on the temperature of the object to be measured, the capacitance and temperature are measured by temperature transducer at the same time to correct the temperature too.GM-115 provides the most effective moisture measurement.
●Temperature converter
To correct the temperature, it is necessary to add a temperature converter and a temperature sensor.
Install the temperature sensor near the measurement electrode.
●Calculation display part（Control part）
The moisture value is the calculated value of capacitance, conductivity, and temperature.
You can start using it immediately by just one-point calibration in the field because the reference moisture value is pre-written in the ROM.
●Measurement electrode（Sensor）
The measuring electrode has a simple structure with no mechanical moving parts.
So it is easy to install and has excellent durability.
Since it has a simple structure, it can be manufactured in various shapes.
●Actual example
The measurement data by GM-115 of a certain company's quasi-aqueous cleaning agent is shown in a graph.
If you measure new liquid and 5% sewage without correction, there will be a difference between the two values.
If you correct the conductivity, the error will disappear and the converted values will match.
If you measure 70℃ liquid and 30℃ liquid without correction, there will be a difference between the two values.
If the temperature is corrected, the error will disappear and the converted values will match.
Standard specifications
| Model type | GM-115-EM15 | GM-115 | EMC-115 | OM-13 | |
| Specifications | Method | Capacitance,conductivity, temperature calculation | Capacitance,conductivity calculation |
Capacitance,conductivity, temperature calculation | Capacitance,temperature calculation |
| Power-supply voltage | AC100V±10％ 50/60Hz | AC100V±10% 50/60Hz (With power cord) | AC100～240V 50/60Hz | ||
| Power consumption | 30W | 7W | 30W | ||
| Accuracy ※2 | ±１wt％ | ±0.05wt% (No air bubbles or dirt) | |||
| Moisture value output (At the measurement range) | DC4～20mA Resistive load up to450Ω |
DC4～20mA Resistive load up to450Ω DC0～10V Resistive load up to5kΩ |
DC4～20mA Resistive load up to450Ω | ||
| Dirt concentration output (Conductivity) | DC 0～10V Resistive load 5kΩ or more | × | |||
| Operating temperature limit | Up to 60℃ (Control unit Up to 40℃) | Up to 60℃ | Up to 40℃ | Up to 60℃ (Control unit Up to 40℃) | |
| Cable length (Sensor - converter) | Coaxial double shielded cable max3ｍ | max10m | |||
| Temperature measurement unit | Method | Resistor PT-100Ω | × | Resistor PT-100Ω | |
| Range | 0～100℃ | 0～100℃ | |||
| Accuracy | ±1℃ | ±1℃ | |||
| Control unit | Power-supply voltage | AC100～240V±10% 50/60Hz |
With any power source (We have wired) | AC100～240V±10% 50/60Hz | |
| Display | Moisture:wt% Temperature:℃ | Moisture:wt% Temperature:℃ Capacitance・Conductivity |
Moisture:wt% Temperature:℃ | ||
| Upper/lower limit alarm contact capacity | AC250V-2A,DC30V-2A | AC250V-2A、DC30V-2A | |||
| Converter | Scale over function | Orange LED:Capacitance,Red LED:Conductivity | Red LED:Conductivity | ||
| Scale over output | NPN open collector | × | |||
| Sensor unit | Electrode material | SUS-304,Teflon(PTFE) | |||
| Temperature sensor | SUS-304 | × | SUS-304 | ||
| Heat resistant range | 0～100℃(No condensation or freezing) | ||||
※2 In order to make stable measurements with high accuracy, you have to pay attention to the following 7points.
- You must set the ambient temperature, degree of dirt, and liquid temperature described in the specifications.
- You must not allow air bubbles to enter the cleaning agent inside the sensor.
- You must not allow sludge or the like to adhere to the inside of the electrodes.
- You must keep the cleaning agent in a uniform emulsified or dissolved state.
- You must prevent changes in the components of the cleaning agent due to impurities.
- You must not mix conductive substances.
- When using multiple units, you must unify the serial numbers.
External dimensions
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