CSL 900 EST
Electronic Stethoscope
The CSL 900 EST Electronic Stethoscope is an acoustic monitoring system designed to support UXO render safe procedures by indicating the status of mechanically timed fuzes. This tool enables operators to monitor internal activity in real-time, improving safety and decision-making during critical EOD operations.
​
At the core of the system is a highly sensitive piezo-electric transducer, which acts as a microphone when placed in contact with the surface of a UXO. Any mechanical vibrations generated within the device are captured and converted into an audio signal. The signal is then amplified and delivered directly to a hard-wired audio headset, allowing operators to detect and assess internal movement.
​
The kit also includes a Doppler radar sensor, enabling remote detection of movement within packages such as bags and briefcases. This provides an additional layer of situational awareness for inspection and monitoring tasks.
​
For flexible deployment, the kit features a multi-position stand that allows the transducer to be positioned close to the target. A range of mounting options, including magnetic, suction, and g-clamp mounts, and supports direct attachment to various surfaces and configurations.
​
The CSL 900 EST includes two 3M ComTac headsets, each fitted with a talkback microphone, and a two-channel duplex amplifier. This allows two operators to communicate while simultaneously monitoring the UXO. The amplifier is powered by four CR123A lithium metal batteries, providing up to 10 hours of operation per set. For extended use, the unit can also be powered via a 12V DC input from a vehicle or an additional battery pack.
Key Features:
-
Acoustic monitoring system for UXO render safe procedures
-
Piezo-electric transducer captures mechanical vibrations
-
Real-time audio feedback via hard-wired headset
-
Doppler radar sensor for remote movement detection
-
Multi-position stand plus magnetic, suction, and g-clamp mounts
-
Two 3M ComTac headsets with talkback microphones
-
Two-channel duplex amplifier for operator communication
-
10-hour operation on four CR123A batteries
-
Optional 12V DC power input for extended operation
Typical Applications:
-
UXO render safe procedures
-
EOD and explosive ordnance monitoring
-
Package and bag inspection
-
Bomb disposal operations
-
Security and counter-terrorism investigations
-
Training and operational readiness exercises

Why Choose the CSL 900 EST?
The VIK is an ergonomic, hand-held device, perfect for counter EO reconnaissance missions.
The CSL 900 EST provides reliable acoustic monitoring and movement detection capabilities, enabling operators to assess the status of mechanical fuzes and internal activity during critical render safe procedures. Its flexible mounting options, dual-headset communication, and long battery life make it a practical and dependable tool for EOD teams operating in high-risk environments.
What's Included?
-
CSL 900 EST Electronic Stethoscope
-
Piezo-electric transducer
-
Doppler radar sensor
-
Multi-position stand
-
Magnetic, suction, and g-clamp mounts
-
Two 3M ComTac headsets with talkback microphones
-
Two-channel duplex amplifier
-
CR123A battery pack (4 cells)
The delicate components of the EST are contained with specially cut foam sections within a ruggedised Peli Case. This makes it safe and secure for both transport and storage.




