Underground monitoring in
harsh environments

The Ru-32mA is a versatile eight channel RTU that can be supplied with one or two pressure sensors and can interface  up to two digital inputs (pulse and/or event), one 4-20mA current loop from a process instrument, one analog voltage or potentiometer input, and two additional inputs to capture the encoded register reading of single or dual water meters such as master meters and compound meters. 

Wireless Communication
Using cellular technology enables unmanned monitoring of remote sites as well as instant updates and alarm  notifications. The Ru-32mA uses a low power, LTE/Cat 1 cellular communication modem certified on multiple
cellular systems. This ensures maximum coverage, reliability of service and alignment with cellular carriers technology roadmaps.

Collecting Data
The Telog Ru-32mA may be confi gured to call it’s server application on a schedule (e.g. once per day; every four hours, etc.) and/or in response to site alarm conditions (e.g. high or low pressure or level exceedance). The recorder can sample the sensor up to four times/second and store the data statistics (minimum, average, maximum or totals)
at user defi ned intervals.

The cellular modem, data recorder and battery are integrated into an IP67 rated, environmentally rugged enclosure weighing three pounds and measuring 8 x 8 x 4 inches (L x W x H). The unit is provided with a panel mount TNC coax connector and will support a variety of certified antennas. All connectors and fi tings are watertight and the
product is environmentally rated IP67 to 9.8 feet (three meters) of depth.

Battery Powered
The Telog Ru-32mA are battery powered and use a single, user replaceable battery pack, Telog BP-4, providing an operating life of up to five years  depending on the user-defined call schedule. A five year battery life example would be sampling two pressure sensors every 10 seconds and water meter registers hourly and transferring data to a
host server on a daily schedule. The recorder can also be connected to optional, customer supplied DC or solar power.

Software Support
Trimble Telog wireless recorders are compatible with all Trimble software applications, including Trimble Unity, Telog Online (cloud), Telog Enterprise and Telogers for Windows application software. This ensures that utilities have a
complete solution addressing all their remote monitoring requirements delivered in a manner that suits each individual utility’s operations and IT needs.


Artboard 3 copy 36.png

Insight into consumption for
Non Revenue Water

Optimized water and site
operations and compliance

Real-time situational awareness
on Pressure or Bursts



Eight channel, underground RTU with embedded cellular modem (4 samples per second max - 250 ms, 1 second interval max):

I2C Pressure Sensors: Channels 1 & 2

  • Resolution: 12 bits (0.025%)

  • Accuracy: ±0.075% of full scale at 73°F [23ºC] ±40 ppm/°F

  • Temperature range: 40°F to 149°F [4° to 65°C]

For applications below this operating range please contact your Trimble Telog support team.

Current Loop (Channel 3): (4-20mA) Input

  • Resolution 12 bits (0.025%)

  • Accuracy ±0.075% of full scale at 70°F [21ºC] ±40 ppm/°F

Analog Input (Channel 4) 0-5 VDC

  • Resolution 12 bits (0.025%)

  • Accuracy ±0.075% of full scale at 70°F [21ºC] ±40 ppm/°F

Digital Input: 2 channels (5 and 6)

  • Type: Selectable pulse counter or event recorder

  • Input: Contact closure or logic driven

  • Excitation: 3 volts at 20 μAmps maximum

  • Pulse Width: 10 mSec minimum

Meter Register Inputs: Reads absolute encoded register values; 4 thru 9 digits in length 3-wire synchronous interface, ASCII coded E.g. Sensus ECR, Neptune


Sample rate: 4 per second to 1 per 8 hours; programmable
Clock accuracy: 0.01%
Memory size: 128 kbytes; 80,000 data values
Storage method: Wrap around (first-in; first-out)


Local RS-232: 5 pin circular connector rated IP67. Auto-selected baud rate to 19.2K
Cellular: IWM2/L1 cellular modem LTE Category 1 certified Verizon Wireless
Bluetooth: Local Bluetooth BLE 4.1


Battery: Factory installed, field replaceable Telog BP-4 lithium battery pack
Battery Life: Up to 2800 data calls to host computer
Call Frequency/Sampling Frequency/Battery Life
1/day, 5/second, 5 years
2/day, 1/second, 3 years (@ medium to excellent signal strength)

External Power: 9-30VDC @ 1A optional via customer supplied DC or solar. Battery becomes back-up if power is lost.


Size: 8” L x 8” W x 4” H [204mm x 102mm x 204mm]
Weight: 3 lbs. [1.4kg]
Material: Polycarbonate


Temperature: -40 to 158ºF [-40 to 70ºC]
Rating: NEMA 6 (IP67)

Support Software

S-3PC: Telogers for Windows®6.52 or later
S-3EP: Telog® Enterprise 6.52 or later
DHS-Service: Telog Online
TW-UNITY: Trimble Unity


Type: Strain gauge pressure sensor
Range: Selectable 5, 10, 30, 100, 300, 1000 PSIG
Accuracy over the calibrated temperature range including zero and span setting and the effects of non-linearity, hysteresis and repeatability: 0.25% FS
Cable: Vented Polyurethane 0.225” diameter [5.715mm]
Pressure Over Range: 2x full scale with negligible calibration change. 4x containment pressure up to 2900psi max

Pressure fitting: 1/4” NPT female
Environmental: Submersible to NEMA 6P (IP68)
Sensor Length: 4.5” [114mm]
Sensor Diameter (max): 1.0” [25.5mm]
Sensor Body Material: 316 stainless steel
Cable Weight: 0.027 lbs./ft


Get the Telog Ru-32mA

Request a Quote



Monitoring Progress: Nailing Down Water Hammer And Its Implications

By Telog, A Trimble Company

If you don't know what a water hammer is, well, that's a big part of the problem. It's an all-too-frequent issue for water systems everywhere, striking in pipelines that are growing more susceptible to failure as they age.

Read More