I-HIOW, I-UIOW, I-HIO and I-UIO Informer Tone-Alert Radio

I-HIOW, I-UIOW, I-HIO and I-UIO Informer Tone-Alert Radio

  • Instant alerting and notification for emergency situations
  • Rugged metal enclosure with internal wiring
  • High output speaker for tone and voice notifications
  • Optional EAS/SAME or Federal Signal digital protocols
  • Windows®-based software for easy programming
  • DTMF and two-tone decoding – standard
  • Desk or wall mounting models
  • External audio and control capabilities
  • US ETL Listed to UL Std 60065
  • Canadian ETL Listed to UL Std 60065 for I-HIOW and I- UIOW

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Alerting the public of an emergency situation is now easier and more reliable than ever with Federal Signal’s Informer I-HIO and I-UIO radio receivers.  Informer units are designed for one-way radio alerting applications.

Informer Radio receivers come in either VHF or UHF-band models. Standard units decode DTMF, single-tone, and two-tone sequential signals (optionally available are units for decoding EAS/SAME or Federal Signal digital protocols). The Informer is capable of generating four separate alarm sounds that can be accompanied by a live voice message.

Informer units include a LED panel that flashes to immediately indicate transmission of an emergency alert. Other features include a 600-Ohm audio output, dual (N.C./N.O.) relay for external control, built-in diagnostics, and an LED test indicator.  The receiver can be programmed to disable the"monitor" button in order to prevent end-users or unauthorized persons from listening to local-channel activity.

The Informer I-HIO and I-UIO desktop versions feature an external AC transformer for power, as well as built-in battery backup.  All wiring is routed to connectors located on the back of the unit for convenient access.

Informer I-HIOW and I-UIOW receivers are designed to be wall mounted or recessed into the wall. All wiring is contained within the aluminum case, and five pre-punched, easy-to-remove conduit holes are available to facilitate wiring connections into and out of the unit.  Informer I-HIOW and I-UIOW receivers include a 115/230VAC power supply pre-wired to internal terminal blocks and a built-in battery backup. These models feature mounting holes for easy top mounting of an optional Federal Signal LP1 Strobe light. Units are pre-wired to accommodate the LP1 Strobe which operates off the Informer’s internal power supply.

Informer units are factory programmed for narrow-band operation and come with a one-year warranty (see owner’s manual).

Note: The I-HIO and I-UIO have mounted two holes on the underside so that it can be mounted on a wall LP1-012* can be installed on I-HIOW/I-UIOW (wall mount units) only.



Frequency Range (MHz) 150-170
Narrowband 405-420*
Intermodulation Rejection per EIA-603, part 4.1.9 >-75 >-70
Adjacent Channel Selectivity per EIA-603, part 4.1.6 >-70 >-65
Spurious Response & Image Rejection (dBm) per EIA-603, part 4.1.8 >-75 >-70
Reference Sensitivity1: (12dB SINAD) < 0.35 microvolts
Squelched >-57 dB(C)
unsquelched >-37 dB(C)
Input I-HIOW/UIOW 115 to 230VAC, 50/60 Hz
General Text I-HIO/UIO 108 to 128VAC, 60Hz
Operating Environment -22º F to 140º F -30 to +60°C
Operating Current I-HIOW/UIOW 350mA Maximum
Standard Signaling Formats Number of codes
Up to 6 activation codes, programmable
Two-Tone Sequential or Single Tone 300 Hz-3000 Hz, tolerance +/- 1.5%
DTMF 1-12 digits
Decode with two-tone codes >400 Hz only.
Tone frequency range 36.6 to 254.1 Hz, Tone accuracy >.05Hz
Tone decode bandwidth +/- 1.1%
Digital, golay (23,12) 23 bit digital word
Digital data rate 134.4 Hz nominal
Turn on time
Acoustic Output:2 I-HIOW/UIOW 80 dB(C)
I-HIO/UIO 85 dB(C)
Dual (N.O./N.C.) relay 5a @ 30VDC
600 Ohm output 50mv - 2.5vpp into 600 Ohms
Antenna Removable rubber duck
External Antenna Connector 50 Ohm, BNC female
I-HIOW/UIOW 8.3" x 7" x 3.3"
210.8 mm x 177.8 mm x 83.82 mm
I-HIOW/UIOW 3.2 lbs (1.45 kg)
I-HIO/UIO 4 lbs (1.81 kg)

Ordering Info

Model Types
I-UIOWWall mount, UHF band, 450-470 MHz
I-UIODesk mount, UHF band, 450-470 MHz
I-HIOWWall mount, VHF high band, 150-172 MHz
I-HIODesk mount, VHF high band, 150-172 MHz
USBUSB Programmer
I-SWProgramming software
I-FSK-KITField installable AFSK kit
I-FSKFactory installed AFSK
I-EAS-KITField installable EAS kit
I-EASFactory installed EAS
Replacement Parts
Radio Informer replacement battery155191A