Battery Powered Telemetry System | AT‑5000 EasyApp
Directly Measure Torque on Rotating Shafts
The Accumetrics' Battery Powered Telemetry System
Model AT‑5000 EasyApp provides easy, dependable wireless measurements, including torque measurements, strain measurements, and more, from a rotating shaft. Measure torque live in real-time with this battery-powered, digital telemetry system. Featuring
a low mounting profile and low power consumption, the system requires no shaft modifications and is fastened to the shaft using a single, sturdy aramid fiber strap. AT‑5000 EasyApp is an ideal non-contact data transmission solution for applications
requiring easy installation and dependable data retrieval, even in high RPM applications.
Battery powered telemetry
Easily and safely secures to shaft with reusable aramid fiber strap
Small size, typically requires 3 in (76.2 mm) radial envelope
High data integrity and noise immunity
Low power transmitter provides longer battery life
Two systems (Channel A and B) can be used side-by-side for multi-channel requirements
Manual shunt calibration invoked at transmitter
Torque testing for half-shafts / propshafts and driveshafts
Replacement of slip rings and in-line torque transducers
Torsional strain testing
RTD temperature measurement
Measuring data on high RPM shafts
Transmit True Torque Data
The Battery Powered Telemetry System Model AT-5000 EasyApp utilizes a small battery powered transmitter mounted using an aramid fiber strap to directly measure, digitize, and transmit true torque data from rotating half-shafts, driveshafts, and rotors
of all sizes and speeds. The system is also used for temperature, voltage, and acceleration sensing.
The AT-5000 EasyApp uses a long-life lithium battery to excite a strain gage and to power the AT-5000 telemetry electronics on the rotating
shaft. The small signal resulting from torque applied to the shaft is amplified, anti-alias filtered, and digitized (typically at 11,718 samples per second). The digital data is reliably RF transmitted off the rotating shaft to a nearby pickup coil,
which is connected to a receiver. The receiver converts the digital data to an analog voltage output (adjustable from 0 ± 1.0 to ± 10 volts). This DC to 1 kHz (or optionally higher) bandwidth voltage output can be fed directly to a data
acquisition system, FFT analyzer, or an oscilloscope.
7812 samples per second; DC to 1.2 kHz frequency response; 4 MHz transmitter
Channel B Transmitter
11,718 samples per second; DC to 1.2 kHz frequency response (DC to 5 kHz available); 6 MHz transmitter frequency. (Channel A and B units can be co-located for 2-channel use.)
Transmitter Module 
<0.1% of full scale (typical)
12-bit (0.025% of full scale)
100 PPM/°C typical, exclusive of external gain resistor
0.7 μV/°C typical (0 85 °C)
DC to 1.2 kHz (up to 5 kHz bandwidth available; AC coupling also available)
Typically <4 mA current draw from 3.6 V battery, excluding sensor excitation
-40 to 185 °F (-40 to 85 °C) High Temperature option is available
3.6 V open circuit; 3.4 V loaded. Low battery indication is transmitted to receiver at approximately 2.7 V.
2/3 length AA. Single use Lithium battery. Note: Non-rechargeable batteries. Do not store or use in applications with exposure to >302 °F (150 °C) temperatures.
95 hours for 1000 Ω and 75 hours for 350 Ω strain gages, continuous use
12 V nominal (9 to 18 VDC) Optional AC power supply 90-240 VAC, 12 VDC output
Output Range. Signals, & Adjustments
±10 volts. Output gain can be adjusted to allow lower outputs (i.e. 5 V). (RSSI) Received Signal Strength Indicator -2 V to +4 V (antenna signal strength). Zero adjust, Gain adjust, and Unipolar/Bipolar output selection.
Dimensions (H x W x D)
NEMA style box: 3 x 6 x 4.25 in (76.20 x 152.40 x 107.45 mm)
32 to 125 °F (0 to 50 °C)
Pickup Coil Choices
24 in (610 mm) ID includes 10 ft cable to receiver
Rigid Brass Loop
Rugged 1/4 in brass loop. 1.25 in x 1.61 in x 2.94 in phenolic base. Includes 10 ft cable to receiver.
Transmitter Modules - Sensor Inputs
Full Bridge Strain Gage
Including other bridge-style transducers, including pressure transducers, resistive accelerometers, load cells, torque transducers, etc.
Type K thermocouple is standard. Standard range is -58 to -750 °F (-50 to 400 °C). RTD sensors can also be used; contact Accumetrics.
0 to 100 mV; external voltage divider can be provided for high voltage measurement.
Up to 2700 V measure with optional external dropping resistor
As a pioneer and global leader in rotor telemetry technology, we design, assemble, and support digital telemetry systems that transmit sensor data from rotating structures using wireless techniques. We were the first company to develop innovative ground fault detection techniques, and twenty-five years later we are still the go-to for ground fault detection technology. Accumetrics is a wholly owned subsidiary of PCB Piezotronics, Inc., a wholly owned subsidiary of Amphenol Corporation.