Ref: CBT

Clamping Battery Telemetry for 1 or 2 strain gages channels

Clamps to any shaft 25 mm or larger
Small Package
2 strain gauge bridge channels
Up to 48 hours of battery life
Lightweight rugged IP67 housing
Digital 2.4 GHz RF link for reliable transmission without interference or spikes
Programmable gain

Usual lead time in range 3 to 4 weeks

Introduction

The Michigan Scientific Clamping Battery Telemetry (CBT) is a wireless, battery powered, signal transmitter for strain gauges that easily mounts to shafts with a minimum diameter of 25 mm, making it ideal for shaft mounting and very versatile. The Michigan Scientific Telemetry provides reliable signal transmission without interference or signal spikes.

Specifications

CBT - 320
RF Frequency Range	2.4 GHz
Channel Type	Strain Gauge, Full Bridge, 350 Ω or higher
Channel Count	1 or 2
Battery Type	Two 18650 Rechargeable lithium batteries
Continuous Battery Life	48 hours for 1 strain gauge bridge. 36 hours for two strain gauge bridges
Weight	140 grams (235 grams with batteries installed)
Gain Type	Programmable gain via USB
Input Type	0.1 to 10 mV/V
Shunt	Resistor Fixed 100 kΩ standard, other shunt resistor values available
Typical Broadcast Distance	1-2 meters, line of sight
Channel Sampling Rate	3 kHz
Signal Output	± 10 Volt Analog
System Resolution	12 Bit
Operating Temperature	-20°C to +50°C (battery temperature limit)
Power Requirement	9 to 36 VDC, 4.5 Watts
Total System Delay	< 670 μs
RF Channels Available	16

Installation

The CBT can conveniently be strapped to any shaft with load rated plastic zip ties, steel banding, or hose clamps. The CBT provides excitation and signal conditioning to the strain gauges, then digitally transmits the signals via RF in the 2.4 GHz broadcast frequency range.

For higher speed shafts when shaft balancing is required a counter weight can be purchased and should be mounted 180 degrees opposite the CBT. The CBT is a small rugged housing and is designed for hostile environments.