Gas Leak and Flame Detectors, Analyzers, Alarm Devices and Calibration Gas
SKU# (2520)

FHF  11245021


$1,194.60     Availability: 5 Weeks
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FHF 11245021
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  • Features
  • Specs
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FHF FernTel 3 ZB Explosion Proof (Ex) Analogue Desk/Wall Telephone (Without keypad) for use in areas with explosive atmospheres. Zone 2, 22. IP65. With armored cord.

Part# with Options:        11245021
Price with Options:        1,194.60


(1) Color for FHF FernTel

  Availability 5 Weeks  ]


  • Protection degree IP 65
  • Stabiliser bracket (optional)
  • Ambient temperature -20C to +55C
  • Call tone ≥ 95 dB(A), 1 m
  • Explosion protection class

  • II 3 G Ex nA L IIC T5
    II 3 D Ex tD A22 IP65 80C

The new telephone for use in areas with explosive atmospheres of zone 2 and 22. Its housing is made of impact- resistant and shockproof Polycarbonate and approved for Zone 2 and 22 according ATEX.

Within ranges of the chemical and petrochemical industry combustible atmospheres result again and again from process engineering operational sequence. Caused e.g. by gas, steam or nebula. Its striking signal colour ensures the FernTel 3 / Zone 2 cannot be missed whenever a telephone is urgently needed in Zone 2 and 22.

The resistance of housing and use of screws of stainles steel are especially advantageous for use in areas with high air humidity and explosive atmospheres. A deft hand movement and the desk telephone is converted into a wall telephone.

Technical specification
Connection data
Call frequencyprogrammable: 16...68 Hz
Pulse-break ratioprogrammable:
1,5 : 1 60/40 ms
2 : 1 66,7/33,3 ms
MFVAccording to CCITT Q23
Flash timeApprox. 80 ms, 1 ms...999 ms programmable
Line voltage24 to 66 VDC
Height x width x depthApprox. 293 x 191 x 128 mm
WeightApprox. 2.3 kg
Operating positionDesktop or vertical wall mounting
Transmitter capsuleElectret microphone
Transmitter capsuleElectret microphone
Incoming telephone lineTCP/La, TCP/Lb
Secondary bellw1, w
Ambient conditions
Display-10C to +55C
Operating temperature-20C to +55C
Transport and storage temperature-25C to +70C
Protection degreeIP 65
Net access, AcousticsTBR 21, TBR 38
Electrical SafetyEN60950
Expl. protection classII 3 G Ex nA L IIC T5
II 3 D Ex tD A22 IP65 80C
Call tone≥ 95 dB(A), 1 m

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FHF  11240020

FHF FernTel 3 Explosion Proof (Ex) Analogue Desk/Wall Telephone for use in areas with explosive atmospheres. Zone 2, 22. IP65.