TR-III
Hooter / Telephone Loud Ringer
Telephone loud ringer so calls are heard over plant noise
107 dB @ 1 mIP 65220/110 V AC
WMHF-IIIPilfer-Proof (Vandal-Resistant) Telephone
Handset-free vandal-resistant phone with press-to-talk for rough-use areas
Hands-free PTT220/110 V ACNEMA-45 kg
Ask an engineer about WMHF-III on WhatsApp →
- Category
- Industrial Telephones
- Environment
- Indoor · Outdoor
- Interface
- Analogue
Ideal for
- Construction sites
- Mines
- Cement plants
- Warehouses
- Large and medium-scale industrial units
What it does
Where handsets get stolen or broken, take the handset away. WMHF-III has a sealed keypad, an internal speaker and CONNECT, RELEASE and press-to-talk switches in a 16 SWG steel housing with integrated canopy. It connects to an EPABX and runs on 220/110 V AC.
- 01
No handset: CONNECT, RELEASE and PTT switches
- 02
Built-in amplifier with internal speaker
- 03
Ringer output 90 dB at 1 m
- 04
Loop up to 4.6 km on 22 SWG copper
- 05
16 SWG steel enclosure with integrated canopy
- 06
Contact for a SMART external loud ringer or flasher
Specifications
Electrical · 6
| Power supply | 220 V AC / 110 V AC (switchable) |
|---|---|
| Set impedance | 600 Ω nominal |
| Ringer sensitivity | 40–100 V @ 16–25 Hz |
| Line voltage | 24 / 50 V DC |
| Loop current | 20–120 mA |
| Fuse | 0.25 Amp 2AG fast blow |
Acoustic · 2
| Audible frequency response | 150–3500 Hz |
|---|---|
| Ringer output | 90 dB at 1 m |
Mechanical · 5
| Housing | 16 SWG steel, powder coated |
|---|---|
| Dimensions | 360 × 160 × 180 mm |
| Weight | 5 kg |
| Mounting | Vertical wall |
| Hardware | Stainless steel |
Environmental · 4
| Temperature | 0 to +60 °C |
|---|---|
| Humidity | 0 to 95% Rh non-condensing |
| Dustproof | Fully gasketted enclosure |
| Protection | Conforming to NEMA-4 |
Connectivity · 3
| Dialling | DTMF or 40/60 pulse at 10 PPS |
|---|---|
| Maximum loop | 15 kft (4.6 km of 22 SWG copper) |
| Connection method | PCB terminal block |
Compare with similar models
Differences first: interface, power, protection and output, then installation. Full specifications are in each model's table.
| Specification | WMHF-III Pilfer-Proof (Vandal-Resistant) Telephone | WMHS-III Industrial Telephone with Handset | WMHF-IIIGSM GSM Remote Location Telephone | WMHF-II Pilfer-Proof PA Telephone, Hands-Free |
|---|---|---|---|---|
| Paging / talkbackdiffers | No | Notelephone only | No | Page phone (built-in amplifier)horn and internal speaker |
| Handsetdiffers | No | Yesnoise-cancelling | No | No |
| Hands-freediffers | Press-to-talkCONNECT / RELEASE / PTT | No | Press-to-talkCONNECT / RELEASE / PTT | Press-to-talkCONNECT / PTT / RELEASE |
| Poweringdiffers | Mains AC220/110 V AC | Line powered | Solar and batteryoptional 220 V AC pack | Not specified |
| Vandal-resistantdiffers | Yes | Nohandset model | Yes | Yes |
| Interfacediffers | Analogue | Analogue | GSM | Analogue |
| Line voltagediffers | 24 / 50 V DC | 24–56 V DC | Not specified | Not specified |
| Diallingdiffers | DTMF or 40/60 pulse at 10 PPS | Not specified | DTMF | Not specified |
| Power supplydiffers | 220 V AC / 110 V AC (switchable) | Not specified | 220/110 V AC in & 14 V DC out power pack; solar 12 V / 30 W (optional); rechargeable battery 12 V / 7 Ah (optional) | 220 V AC / 110 V AC (switchable) |
| Protectiondiffers | Conforming to NEMA-4 | IP 65 | IP 65 | IP 65 |
| Environmentdiffers | Indoor, Outdoor | Indoor, Outdoor | Outdoor | Indoor, Outdoor |
| Mountingdiffers | Vertical wall | Vertical wall | Vertical wall | Vertical wall / panel |
Downloads
PDFSMART WMHF-III datasheet319 KBQuestions
How far can it be from the exchange?
The datasheet gives a maximum loop of 15 kft, about 4.6 km of 22 SWG copper.
Related models
All industrial telephones →
FL-III
LED Flasher
LED flasher that shows an incoming call from up to 100 m
100 m visibilityIP 65220 V AC
Need WMHF-III for a project?
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