Description
The TCMB is a thermocouple cable sensor with GL type approval, manufacturer type Müller TE-K1G.
It is the approved version of the cable sensor for measuring points where there is no space for a connection head: rigid protective tube, pressed transition, fixed cable for evaluation, no terminal compartment and no electronics. Compared to the TE-K1, it is shorter – the nominal length is between 30 and 70 mm and is limited to 200 mm, the cable to 6 m. The protective tube is made of 1.4571 (316Ti) and is approved up to 600 °C, with Ø 4, 5 or 6 mm and a wall thickness of 0.25 … 1 mm; the protection class is IP 65 up to 250 °C.
The transition to the cable is pressed, with a heat shrink tube serving as kink protection, optionally a spring. Five cable designs from PVC to glass silk are available, standard length 2 m. The response time is t90 30.9 s for 6x0.5 mm, and t90 22.1 s for 6x1 mm.
The measuring element is a thermocouple Type J (Fe-CuNi) or Type K (NiCr-Ni), single or double, without insulating material. The operating range for Type J is -200 … +700 °C and for Type K it is -200 … +1000 °C. The limit deviation follows DIN EN 60584-2 Class 1: ±1.5 °C in the range -40 … 375 °C and ±0.004|t| above. The thermoelectric voltage is directly available at the output, at open ends or at a TE plug; a transmitter is not documented. For insulation, the manufacturer only specifies a test voltage of 500 VDC.
Note before ordering: The approval GL TAA00002H3 is confirmed as a mark and number, not as a certificate; the certificate must be requested before making an assurance to the classification society. Both versions bear the product identification KT; they are distinguished only by the thermocouple type: 4 … 7 is the TE-K1G, 0 … 3 is the TE-K1. The nominal lengths are stated twice differently in the data sheet – the characteristic values block lists 30, 46, 50 and 70 mm, the order key additionally 50 mm for Ø 4; the desired length must be specified in plain text in the order. The operating range is determined by the cable, not by the sensor: PVC withstands -5 … +70 °C, silicone -45 … +180 °C, PTFE -75 … +250 °C, glass silk -60 … +550 °C. The ambient temperature is not the medium temperature, and for cable sensors, the cable is in the ambient environment. IP 65 does not apply to the version with screen braiding. CE mark and explosion protection are not documented. The version without GL approval is the TCMA (TE-K1), available up to 2000 mm.
Advantages at a glance
- GL type approval TAA00002H3 documented in manufacturer's data sheet
- Thermocouple type J or type K, operating range up to +1000 °C
- Limit deviation according to DIN EN 60584-2 Class 1
- Protective tube 1.4571 (316Ti), Ø 4, 5 or 6 mm, up to 600 °C
- Nominal length 30 … 70 mm, maximum 200 mm
- Cable standard 2 m, maximum 6 m, PVC to glass silk
- Version without GL up to 2000 mm as TCMA (TE-K1)