Version 0.1
60
Batteryless telephone system with public address mode BLTS-1006
Intercom helmet type
Size measurement, mm
l
l
1
l
2
l
3
l
4
l
5
b
b
1
b
2
s
s
1
TH-4L-S (I)
310
325
238
120
153
160
21
45
200
10
10
TH-4L-S (II)
TH-4L-W (I)
323
338
242
120
161
160
21
45
205
10
10
TH-4L-S (III)
TH-4L-W (II)
336
351
246
120
169
160
21
45
210
10
10
TH-4L-W (III)
349
364
250
120
182
165
21
45
215
10
10
Note – I, II or III –intercom helmet size.
Intercom helmet with throat microphone
TH-4L-S, TH-4L-W, TH-4L-S-C, TH-4L-W-C, TH-4L-S-AC, TH-4L-W-AC
Description: external communication device of pub-
lic address substations to conduct talk-back communica-
tion in environment of normal noise level.
Features:
freedom to move;
PTT switch type;
may be connected to telephones and сommutator tel-
ephones;
CE type cord may be used;
summer and winter types.
cable TH-4L-S, TH-4L-W with bare ends;
cable TH-4L-S-C, TH-4L-W-C with plug connector;
cable TH-4L-S-AC, TH-4L-W-AC with angle plug
type connector.
Technical specifications:
operating frequency range: 300…3400 Hz;
noise stability at acoustic max. 133 dB: at least 16 dB;
word intelligibility at acoustic noise max. 133 dB: at least 94 %;
operating temperature: –40 ℃…+55 °C;
IP rating: IP56;
weight of intercom helmet:
– summer, max. 0.95 kg;
– winter, max. 1.05 kg.
