If gases escape through leaks in piping systems (e.g. untight screwed connections, corrosions and so on) ultrasonic noises are generated. By means of LD 400 even the smallest leakages which cannot be heard by the human ear can be detected even from distances of several meters. LD 400 transforms the inaudible signals into a frequency which can be identified. By means of the comfortable sound-proof headset these noises can be realized even in extremely noisy environments.
Due to a particularly designed acoustic trumpet a better focusing of the acoustic waves is achieved. This acoustic trumpet acts like a directional microphone while interfering ambient noises are cushioned and the accurate localization of the leakages is eased even in areas which are difficult to access.
Long Range Wireless Soil Moisture Sensor
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Monnit ALTA Soil Moisture Sensor measures soil moisture tension and soil temperature within the soil. It uses a resistive granular matrix element to accurately measure the matric water potential (soil moisture tension) in the soil and a thermistor based temperature element to measure temperature.
- Safe to use in both hot and freezing temperatures
- Reports matric potential (soil water tension) which is the best indicator of water availability in the soil.
- Moisture readings in centibar and kPa
- 0 to 240 centibar (kPA)
- Will not dissolve in soil
- Internally compensated for commonly found salinity levels
- Easy to install and use compared to traditional tensiometers
- Stainless steel electrodes
- No maintenance required
- Temperature readings in C/F.
- 5 ft removable lead
Principle of OperationMonnit ALTA Soil Moisture Sensor uses a resistive granular matrix element to accurately measure the matric water potential (soil moisture tension) in the soil.Soil Moisture Element: The soil moisture element is unique in that it takes its resistive measurement within a defined and consistent internal matrix material, rather than using the surrounding soil as the measurement medium. This unique feature allows the sensor to have a stable and consistent calibration that does not need to be established for every installation. Temperature Element: The soil moisture sensor also comes equipped with a temperature element on the end of the soil moisture lead to make accurate soil temperature measurements as well. The temperature reading is also used for temperature compensation of the soil moisture measurements so no need to worry about getting different moisture readings just because the temperature changes. Example Interfacing
Features of Monnit ALTA Sensors
*Actual range may vary depending on environment. **Battery life is determined by sensor reporting frequency and other variables. Other power options are also available. |
ALTA Industrial Wireless Soil Moisture SensorTechnical Specifications |
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Supply Voltage | 2.0-3.8 VDC (3.0-3.8 VDC using power supply) * |
Current Consumption | 0.2 µA (sleep mode), 0.7 µA (RTC sleep), 570 µA (MCU idle), 2.5 mA (MCU active), 5.5 mA (radio RX mode), 22.6 mA (radio TX mode) |
Operating temperature range (board circuitry and battery) | -40°C to 80°C (-40°F to 176°F) ** |
Range | 0-240 centibar or kPa (Water Tension) |
Temperature Accuracy | ± 0.1°C |
Datalogging | Datalogs up to 4000 readings if gateway connection is lost |
Wireless Range | 1,200+ ft non-line-of-sight |
Security | Encrypt-RF ® (256-bit key exchange and AES-128 CTR) |
Weight | 4.2 ounces |
Certifications | 900 MHz product; FCC ID: ZTL-G2SC1 and IC: 9794A-G2SC1. 868 and 433 MHz product tested and found to comply with: EN 300 220-2 V3.1.1 (2017-02), EN 300 220-2 V3.1.1 (2017-02) and EN 60950 |
*Hardware cannot withstand negative voltage. Please take care when connecting a power device. **At temperatures above 100°C, it is possible for the board circuitry to lose programmed memory |