Environment-resistant temperature measurement unit NR-XTH08T

NR-XTH08T - Environment-resistant temperature measurement unit

  • CE Marking
  • CSA




Input method

Insulated single-end input, channels insulated from each other, input channels insulated from the case and other units (system)

Number of input channels


Input connector type

Miniature thermocouple connector (Universal type)

Measurement cycle

Maximum sampling cycle: 10 ms (100 Hz) to 1 h

A/D converting system

Delta-sigma method

A/D resolution

24 bits

A/D integration time (noise filter)

AUTO (Automatic configuration according to sampling cycle), 2.5 ms (400 Hz), 16.7 ms (60 Hz), 20 ms (50 Hz), 100 ms (10 Hz)

Input type

Thermocouple: K, J, E, T, R, S, B, N, C

Low pass filter

PASS / 200 Hz / 20 Hz


Switchable between ON/OFF, Averaging rate: 2 to 128 (moving average)

Reference contact compensation

Switchable between internal and external

Reference contact compensation accuracy

±0.5°C ±0.9°F (23°C ±3°C 73.4°F ±5.4°F at input terminal temperature equilibrium)

Maximum input rating

±30 V*2

Maximum allowable input ground voltage

Dry locations: 30 VAC and 42.4 Vpeak, or 60 VDC
Wet locations: 16 VAC and 22.6 Vpeak, or 35 VDC

Withstand voltage

Between measurement input terminal and case/other units (system): 1000 VAC (50 Hz / 60 Hz) for 1 minute
Between measurement input terminals: 1000 VAC (50 Hz / 60 Hz) for 1 minute

Input impedance

10 MΩ or more

Input signal source resistance

2 kΩ or less

Thermocouple burnout detection

Switchable between ON/OFF, When ON: Approx. 10 μA current detection*3

Measurable range

K: −100 to +1372°C -148°F to +2501.6°F, −200 to −100°C -328°F to -148°F
J: −100 to +1200°C -148°F to +2192°F, −200 to −100°C -328°F to -148°F
E: −100 to +1000°C -148°F to +1832°F, −200 to −100°C -328°F to -148°F
T: −100 to +400°C -148°F to +752°F, −200 to −100°C -328°F to -148°F
N: −100 to +1300°C -148°F to +2372°F, −200 to −100°C -328°F to -148°F
C: 1500 to 2315°C 2732°F to 4199°F, 0 to 1500°C 32°F to 2732°F
R: 300 to 1768°C 572°F to 3214.4°F, 0 to 300°C 32°F to 572°F
S: 300 to 1768°C 572°F to 3214.4°F, 0 to 300°C 32°F to 572°F
B: 400 to 600°C 752°F to 1112°F, 600 to 1820°C 1112°F to 3308°F

Measurement accuracy

K: ±0.04% of rdg ±0.4°C ±0.7°F, ±0.43% of rdg ±0.1°C ±0.2°F
J: ±0.03% of rdg ±0.3°C ±0.5°F, ±0.30% of rdg ±0.1°C ±0.2°F
E: ±0.03% of rdg ±0.3°C ±0.5°F, ±0.27% of rdg ±0.1°C ±0.2°F
T: ±0.4°C ±0.7°F, ±0.34% of rdg ±0.1°C ±0.2°F
N: ±0.02% of rdg ±0.6°C ±2.1°F, ±0.63% of rdg ±0.1°C ±0.2°F
C: ±0.10% of rdg ±0.2°C ±0.4°F, ±0.04% of rdg ±0.8°C ±1.4°F
R: ±0.01% of rdg ±1.2°C ±2.2°F, ±2.0°C ±3.6°F
S: ±0.02% of rdg ±1.2°C ±2.2°F, ±2.0°C ±3.6°F
B: ±2.2°C ±4.0°F, ±1.6°C ±2.9°F

Display resolution

K: 0.05°C 0.09°F
J: 0.05°C 0.09°F
E: 0.05°C 0.09°F
T: 0.01°C 0.02°F
N: 0.05°C 0.09°F
C: 0.05°C 0.09°F
R: 0.05°C 0.09°F
S: 0.05°C 0.09°F
B: 0.05°C 0.09°F

Buffer memory

16M data*5

Warm up time

30 minutes or more

Common mode noise reduction ratio

135 dB or more (up to 60 Hz DC) (typ.) *4

Remote connection

Dedicated environment-resistant remote unit input port × 1 (Remote IN), output port × 1 (Remote OUT)
Connection to NR-X100W master data collection unit or other NR-XR01 remote units using environment-resistant unit cable
Connectable to multiple environment-resistant measurement units*6

Synchronization accuracy between remote connection units

±1 μs*7

Power supply

Supplied from NR-X100W master unit

Power consumption

5.0 W max.

Surrounding air temperature

−40 to +85°C -40°F to +185°F*8

Operating ambient humidity

Max. 100% RH*9

Vibration resistance

100 m/s2 328.1 ft/s2; 5 to 2000 Hz; 2 hours in each of the X, Y, and Z directions (IEC 60068-2-6)*10
Equivalent to JIS D1601 Stage 45 (Class 1, Class 2, and Class 3; equivalent to Class B) automotive vibration standard

Shock resistance

1000 m/s2 3280.8 ft/s2; 3 times in each of the X, Y, and Z directions (18 times in total) (IEC 60068-2-27)

Enclosure rating

IP65/IP67 (IEC 60529)
Enclosure Type 4X (UL 50E, CSA C22.2 No. 94.2, NEMA 250)
Indoor/outdoor use


Main unit case: Aluminum die-casting (coated) / PBT+PC / PC, Display: Reinforced glass,
Connectors: Brass (chromate processing), Connector protection cap: PBT+PC


Approx. 660 g 23.30 oz

*1 Max. expansion: 64 ch (with 8 units connected, using NR-X100W)
*2 Protection rating against temporary overvoltage. Do not apply voltage directly from an external source.
*3 The time until detection is confirmed varies depending on the acquisition setting and the input signal source resistance. Detection may be disabled depending on the low-pass filter and sampling cycle settings. For details, see P. 5–29.
*4 Does not include reference junction compensation accuracy. Specified with an A/D integration time of 20 ms (50 Hz) / 16.7 ms (60 Hz), the low-pass filter set to PASS, averaging set to 2 times, and after the warm-up time has passed and the temperature has stabilized (23°C ±3°C 73.4°F ±5.4°F).
*5 The buffer memory that can be used by the entire system is limited by the NR-X100W buffer memory.
*6 Environment-resistant unit cables can be extended by connecting an environment-resistant unit extension cable. The total length of cables used in the system should be no more than 100 m 32.8'. The distance between the NR-X100W (or NR-XR01) and environment-resistant measurement units or between environment-resistant remote measurement units should be no more than 60 m 196.9'.
*7 The sampling cycle and timing vary depending on the various measurement units used in the system.
*8 Install the product on the specified mounting sheet metal (OP-88613) for use with ambient temperatures of 80°C 176°F or higher.
*9 Use the product under the condition that the absolute humidity is 85°C 185°F with 90% RH or less. Avoid sudden temperature and humidity changes to prevent significant condensation and freezing.
*10 Testing with a 50 mm 1.97" p-p displacement limit used for 5 to 10 Hz.

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