DG-PLM-R-L5 Hydrostatic Level Transmitter

The product employs hydrostatic measurement, using a pressure sensor to detect the water level. When taking measurements, it is important to address potential issues such as blockage of the sensor’s pressure port or pressure chamber, as well as the influence of atmospheric pressure. In practical applications, regular maintenance and cleaning are essential.

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Urban Underground Pipeline Monitoring Instrument

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产品描述

- Commodity name: DG-PLM-R-L5 Hydrostatic Level Transmitter
Measurement principle

The product employs hydrostatic level measurement, using a pressure sensor to detect the water level. When taking measurements, it is important to address potential issues such as blockage of the sensor’s pressure port or pressure chamber, as well as the influence of atmospheric pressure. In practical applications, regular maintenance and cleaning are essential.

Key Features

Digital pressure sensor with excellent temperature characteristics.
The hydrostatic sensor employs a weighted‑pendulum mounting, making it suitable for rapid installation and maintenance in manholes.
A specialized pressure‑compensated buffer chamber enhances the sensor’s resistance to clogging, ensuring more stable measurements.
The host unit is equipped with an expansion bolt kit, enabling rapid installation at the wellhead.
The host features a stainless steel housing, offering excellent corrosion resistance, waterproofing, and impact resistance.
Rigid sealing, unaffected by temperature fluctuations.
Supports multiple lid openings without compromising waterproofing, making on-site battery replacement convenient.
Optional color local display unit accessory can be added.
Anti-condensation and backflow‑preventing breathing system
Low self-discharge batteries enable devices to achieve longer battery life.

Application scenarios

Measurement of manhole water levels, river channel water levels, and canal water levels is employed in situations where external power supply is unavailable—for example, when connection to the municipal grid or a solar‑powered system is not feasible. Data are transmitted wirelessly to a server. 。

Technical Specifications

Hydrostatic type: Measurement range: 0–5 meters, customizable.
Water level accuracy: 0.5% FS ± 0.001 m
Water level resolution: 0.001 m
Sensor: Digital static pressure sensor with air‑guiding device
Protection: IP68
Static pressure sensor: 100 kPa, others
Host housing: 304 stainless steel
Operating temperature: -10°C ~ 70℃

Battery: Built-in lithium‑ion battery, 76 Ah or 133 Ah / 3.6 V DC; self‑discharge rate not exceeding 5% per year.
Refresh: Factory default: measure once every 5 minutes and upload once; configurable.
NB‑IoT battery life: Under a 5‑minute measurement‑and‑transmission cycle, a 76 Ah battery lasts 5.5 years, while a 133 Ah battery lasts 10 years.
4G battery life: Under the “5-minute test‑and‑transmit” operating condition, a 76 Ah battery lasts 5.5 years, while a 133 Ah battery lasts 10 years.
Wireless breakpoint resumption: When the base station signal is interrupted, data is automatically saved and, once the wireless signal is restored, the timestamped data is resent.