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TG8Ex serie
zone II

Description and application

TG8Ex serie
zone II

The sensors series TG8EX are designed to meet the requirements of EN 60079-0:2013+A11:2014, EN 60079-7:2016 and EN 60079-31:2014, as amended. Sensors marked on the nameplate with II3G Ex ec IIC T6…T2 Gc and II3D Ex tc IIIC T60°C…230°C DC can be used in potentially explosive environments – Equipment Group II, Zone 2 and Zone 22. The sensors operate on the principle of defined dependency of the change of property of the sensor and the change of temperature. They are not capable of generating sparks, arcs or high surface temperatures. The temperature range for use in potentially explosive environments is limited by the insulation of the cable used and specifically specified in the operating instructions – the specified measuring range must not be exceeded, even for a brief period. The lead-in cable may have an outer PVC, silicone or PTFE (Teflon) insulation and may be either shielded or unshielded. According to EN 60529, the sensors meet IP 65 in the case of PTFE (Teflon) cable insulation and IP 67 in the case of other supply cables. The sensors are designed to be operated in a chemically non-aggressive environment, the use must be chosen with regard to the temperature and chemical resistance of the case and the supply cable.

  • Serie TG8Ex – In combination with the JTG8 thermowell or central holder, supplied as accessories, the sensors can be used for temperature measurement of gaseous and liquid substances in piping or air conditioning ducts or separately for temperature measurement of solids.


  • Manufacturer provides EU Declaration of Conformity. The declaration is issued on the basis of the following certificates issued by the Physical-Technical Testing Institute Ostrava – Radvanice: - TG8Ex   Appendix No. 2 to Certificate No. FTZÚ 07 ATEX 0142X
  • Calibration – The final metrological inspection – comparison with standards or working instruments – is carried out for all the products. Continuity of the standards and working measuring instruments is ensured within the meaning of the Section 5 of Act no.505/1990 on metrology. The manufacturer offers a possibility to supply the sensors calibrated in SENSIT s.r.o.’s laboratory (according to requirements of the EN ISO/IEC 17025 standard) or in an Accredited laboratory.  

  • Specifications
  • Wiring diagram
  • Dimensional draft
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Sensor type TG8Ex
Standard types of sensing elements all types
(Pt 100, Pt 1000, Ni 1000, Ni 10000,Ni 2226=T1, NTC, PTC, KTY,
TSiC, DALLAS, thermocouple K, thermocouple J, thermocouple T and so on)
Measuring range Y -- T2: - 40 ≤ Ta ≤ 230 °C cable PTFE(teflon)
T3: -30 ≤ Ta ≤ 180 °C cable SILICONE
T5: -20 ≤ Ta ≤ 95 °C cable PVC up to 205 °C
T6: - 20 ≤ Ta≤ 70 °C cable PVC
Recommended/ maximum
DC measuring current
1 mA/ 3 mA for the sensors with sensing element Pt 100
0.5 mA/ 1.5 mA for the sensors with the sensing element Pt 500
0.3 mA/ 1 mA for other sensors
DC power consumption of sensing element
0.05 mW/ 1 mW for the sensors with the sensing element NTC 20 kΩ
Accuracy class Ni sensing elements: B class, Δt = ± (0.4 + 0.007t), for t ≥ 0; Δt = ± (0.4 + 0.028|t|), for t ≤ 0 in °C;
Pt sensing elements: B class according EN 60751, Δt = ± (0.3 + 0.005|t|) in °C
NTC 20 kΩ: ± 1 °C for the range 0 °C to 70 °C
Sensor connection 2-wire, 3-wire, 4-wire
Insulation resistance min. 200 MΩ at 500 V DC, at the temperature 15 °C to 35 °C, maximum rel. humidity 80 %
Dielectric strength (ATEX) 1 000 V DC during the period 1 s, at the temperature 15 °C to 35 °C, maximum rel. humidity 80 % according to the article 6.8.1. of the EN 60079-15 ed. 2 standard
Ingress protection IP 67 for cables with PVC and SILICONEinsulation
IP 65 for cables with PTFE (teflon) insulation
- in accordance with EN 60529
Types of lead-in cables and their thermal resistivity -50 to 200 °C MCBE-AFEP, 2 x 0.34 a 4 x 0.22 mm2, silicone insulation
-40 to 105 °C FLRYWYW, 2 x 0.35 a 4 x 0.35 mm2, PVC insulation up to 105 °C
-30 to 80 °C LiYCY 0 x 0.34 mm2, PVC unsulation
-50 to 260 °C PTFE insulation
Weight according to the length of the cable, minimum 0.15 kg



Stem length

40 to 400 mm
Stem diameter 5.7 mm, 6 mm, 7 to 10 mm, 12 mm
Material of the stem stainless steel DIN 1.4301, DIN1.4571, DIN 1.4404
Time response τ0,5 ≤ 5 s, τ0,9 ≤ 12 s for diameter 5.7 mm
τ0,5 < 9 s, τ0,9 ≤ 20 s for diameter 6 mm
τ0,5 < 14 s, τ0,9 ≤ 35 s for diameter 7 to 8 mm
τ0,5 < 25 s, τ0,9 ≤ 60 s for diameter 9 to 10 mm
τ0,5 < 35 s, τ0,9 ≤ 80 s for diameter 12 mm

Manufacturer reserves the right to make changes in design and technical characteristics of the products. For actual information, please always contact your dealer.

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