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UHF-STE · UHF contact audio transmitter
UHF stethoscope audio transmitter for glass and windows
UHF-STE picks up sound-induced vibrations from glass and windows and transmits the audio in real time to a compatible UHF receiver. The compact contact microphone uses crystal-controlled WFM transmission. Monitoring through walls or ceilings requires an optional component available on request.
- UHF transmission within 416.5–423.5 MHz.
- 5–7 mW output power and 200–6000 Hz audio bandwidth.
- Replaceable 3 V CR2450 battery in a slide-out holder.
- Up to 50 hours under ideal conditions. Actual runtime varies with use.
- 30 × 18 mm metal housing with a 160 mm flexible antenna.
Product code: UHF-STE
Price on request
Describe the surfaces and audio equipment you plan to use.
Technical consultation, training and support.
+39 080 302 6530
Contact audio monitoring over a UHF radio link
Glass and window pickup
The contact transducer picks up surface vibrations. An optional component extends the application to walls and ceilings.
Crystal-controlled WFM
The transmitter sends live audio to a compatible receiver using wideband FM and crystal frequency stabilization.
Replaceable battery
Inserting the 3 V CR2450 battery activates the unit. The slide-out battery holder allows straightforward replacement.
Full description
Contact pickup with wireless audio transmission
UHF-STE combines a high-sensitivity contact transducer and an analog UHF transmitter in a compact metal housing. The sensor detects sound-induced vibrations at the surface and sends the audio in real time using WFM modulation.
The standard application is monitoring through glass and windows. Walls and ceilings require a separate optional component, available on request. Pickup quality depends on the surface and contact between the transducer and the material.
Receiver selection and battery operation
The crystal-controlled transmitter operates within 416.5–423.5 MHz with 5–7 mW output power. Monitoring requires a receiver matched to its operating frequency and WFM modulation. Recommended equipment includes the IC-ERRE receiver and DIGICELL recorder for recording from the receiving setup.
A 3 V CR2450 battery fits into the slide-out holder and activates the transmitter. Runtime is up to 50 hours under ideal conditions and varies with use. The package includes the radio stethoscope and battery. UHF-STE is also part of the analog audio transmitter range.
Technical specifications
| Transmitted audio bandwidth | 200–6000 Hz |
|---|---|
| Transmission frequency range | 416.5–423.5 MHz |
| Frequency control | Crystal stabilized |
| Output power | 5–7 mW |
| Modulation | WFM |
| Power supply | 3 V CR2450 battery |
| Battery runtime | Up to 50 hours under ideal conditions. Actual runtime varies with use. |
| Activation | Automatic when the battery is inserted |
|---|---|
| Battery replacement | Slide-out holder |
| Antenna | External flexible antenna, 160 mm long |
| Dimensions | 30 × 18 mm |
| Housing | Metal |
| Surfaces | Glass and windows; walls and ceilings with an optional component |
| Package contents | UHF-STE radio stethoscope and 3 V CR2450 battery |
Applications
Glass and window monitoring
For authorized audio monitoring through glass, the contact transducer picks up surface vibrations and relays the signal to a separate receiver.
Monitoring from a separate position
The UHF link carries audio without a cable between the contact microphone and receiver. Usable distance depends on obstacles, the environment and the receiving equipment.
Wall and ceiling applications
The optional component adapts the system for contact monitoring through walls and ceilings. Select the accessory for the intended surface before specifying the setup.
Technical support
Application review
Discuss the surfaces, contact points and monitoring requirements before selecting a system.
Setup and training
Guidance on surface contact, optional component selection and receiver setup.
After-sales assistance
Technical support for audio reception, battery replacement and troubleshooting.
Explore the range
Related products
Compare alternatives selected for their function, supported bands, and form factor.
IC-ERREWide-Coverage Receiver
A receive-only alternative with AM, FM and WFM modes.
EN-R5DUHF Audio Surveillance Receiver
A dedicated reception option for compatible analog and digital audio transmitters.
MM-STEWall Microphone Stethoscope
Dual-probe contact microphone with stereo amplification and external recorder connectivity.
MMS-M66Dual-Probe Wall Microphone
Needle and contact probes for different surface and gap applications.
Talk to our team
Specify your contact monitoring setup
Describe the surfaces and your monitoring or recording requirements. Our team can review the application and provide pricing for UHF-STE.
Or call us: +39 080 302 6530