Wireless Water & Wastewater Monitoring with Rugged, IP67 Rated Recording Telemetry Units

Telog’s Ru-33 Recording Telemetry Unit, (RTU), provides real-time monitoring and alarming of instruments and sensors found in the harsh environment of sewers and underground water vaults. 

The Telog Ru-33 has low power requirements and automatically monitors level, flow, pressure and water quality sensors. Data is forwarded wirelessly to a host computer operating Telog Online, Telogers for Windows or Telog Enterprise. Data communication may be scheduled frequently (e.g. daily, hourly, every five minutes, etc.) and/or immediately in response to site alarm conditions. 

The Telog Ru-33 supports multiple sensor interface options including RS-232, RS-485, analog and digital inputs. For example, when connected to an open-channel flow meter via RS-232, the RTU can interrogate the meter for its most recent level, flow velocity and battery voltage measurements. 

Telog also provides optional sensors that may be directly attached to the Telog Ru-33 including ultrasonic and pressure level, water quality Sondes, temperature, level switches and a rain gauge. 

Wireless communication is supported via and internal Telog WM2/L1 cellular modem LTE Category 1 certified Verizon Wireless. The modem is upgradable to future communications technologies  An optional burial antenna may be embedded in the street pavement producing a complete underground wireless monitoring solution. 

The Telog Ru-33 is powered from a single, 6-volt lantern battery providing an operating life of six months to two years depending on sensor interface and call schedule

Telog Ru-33 with ultrasonic level sensor

Telog Ru-33 with ultrasonic level sensor

Monitoring application solutions include:

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IP-67 Rating

All connectors and fittings are watertight and the product is environmentally rated IP67 to 3 meters of depth

Battery Operated

AC power is not needed, significantly reducing installation and maintenance costs


Provided with the Telog WM2/L1 cellular modem LTE Category 1 certified Verizon Wireless and upgradeable to future communications technologies

Data Backup

Data loss is not a concern because the recorder stores over 67,000 interval statistics before overwriting the oldest data with new.


Application Solutions

Monitoring Cla-Val pressure reducing valves

Three configurations for wireless CSO/SSO monitoring & reporting

SCADA alternatives for remote monitoring

Creek level monitoring


City of Baltimore uses Telog recorders to monitor hundreds of sewer flow sites

What an inflow and infiltration study revealed to the City of Greater Sudbury

Telog RTUs continued to collect data during super storm Sandy

How Blacksburg increased their wastewater collection system capacity

Real-time flow monitoring achieved for less money in Newtown Bucks County

London, Ontario solves data loss issues

SCADA alternatives for remote monitoring

How Newport News saved time and money with remote monitoring

Using web-based flow monitoring and hydraulic modeling system to eliminate the blind spot



Recorder Model: Telog Ru-33
Type: Type: Multi- channel underground RTU


-- Sample rate: Programmable from 1/Sec up to 8 hours each channel
-- Data interval: Programmable from 1/sec up to 8 hours each channel

-- Size: 512 Kbytes
-- Storage method: Wrap around (first-in; first-out)
-- Data capacity: Dynamically allocated to active channels, any combination of:
     --- Analog input:270,000 values
     --- Pulse input: 200,000 values
     --- Event input: 67,000 values
     --- ComSensor input: 100,000 values

-- Standard: local RS-232, 4 pin circular connector rated IP-67, auto-selected baud rate to 19.2K
-- Cellular: Internal Telog WM2/L1 cellular modem LTE Category 1 certified Verizon Wireless
-- Modem upgradable to future communications technologies.

Inputs (Limited to one ComSensor + one analog + one digital)
-- ComSensor/meter: Selectable RS-232 or RS-485 to 19.2 Kbaud. Protocol determined by meter or sensor.
-- Analog: Selectable ranges: 0-1 VDC, 0-5 VDC, 4-20 ma   Excitation: Pulsed +5 or +12 VDC, (selectable duration)   Resolution: ±0.025%; 12 bits/Accuracy: 0.1% of full range at 25ºC ±50 ppm
-- Digital (one channel): Type: Selectable pulse counter or even recorder   Input: Contact closure or logic driven input   Excitation: 5 VDC at 20 µAmps (max)  |  Pulse width: 10 mS minimum

-- Factory installed: Single 6V alkaline lantern battery, Eveready Energizer model 529

Battery Life Example
-- Input ComSensor: Sigma 900 series flow meter with 1xRTT wireless communication and sampling rate of 5 minutes. The battery life for this unit with the following call schedules will be: 5 minutes = 1 month   15 minutes = 3 months   2 hours = 1 year/24 hours = 2 years.

External Power Input
-- 9 to 15VDC @ 1amp Max

-- Size: Cylindrical 4.5" x 15.4"  |  Weight: 7 lbs  |  Material PVC

-- Temperature: 0 - 70º C
-- Submersible: IP67 (NEMA 6)

Support Software
-- Telog Online (Data Hosted Solution)
-- Telogers Enterprise
-- Telogers for Windows
-- Trimble Unity

Supported Sensors
-- Pressure Level Sensor: Submersible pressure sensor
-- Model: Telog PMP-1030
-- Ranges: 0-5 PSI thru 0-3-- PSI
-- Accuracy: ±0.25% of full scale
-- Construction: 316 stainless steel
-- Vent: In-line dry box with user replaceable desiccant

Ultrasonic Level Sensor:
-- Ultrasonic transmitter (ComSensor)
-- Model: Massa M5000/95
-- Frequency: 95 KHz
-- Range: one foot to 13 feet
-- Beam Angle: 8º conical
-- Accuracy: ±0.25% over any range segment exceeding 12 inches (homogeneous environment)

Temperature Sensor
-- Model: AT-3u ambient temperature sensor
-- Range: -20 to +70º C
-- Accuracy ±0.2º C
-- Size: Stainless steel probe (4" x ¼") with three meters of cable


Get the Telog Ru-33

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