JS8746A-0.15.

## JS8746 

## Harsh Environment Temperature Sensor 

Ensuring a temperature-controlled environment for transportation of goods by land, sea or air is of the utmost importance to guarantee that the merchandise does not deteriorate during shipment due to temperature. In many cases, such as medical products, the shipping companies have a statutory duty to demonstrate that the product has been kept within strict temperature limits. Failure to do so can lead to the write-off and destruction of large quantities of expensive product. 

The marine environment is especially complex and susceptible to change; container ships are subject to the extremes of artic and tropical weather systems. Sea water is highly corrosive, containing large quantities of chlorides and sulfates. Ozone, ultraviolet sunlight (UV) and cleaning detergents provide additional degradation potential to exposed materials. 

Although the JS8746 Harsh Environment Temperature Sensor has been designed to address all aspects of temperature measurement for HVAC control systems in the container-ship market, this sensor can also be used in a variety of other applications. Employing materials and build standards that enhance the sensor’s ability to withstand water ingression and degradation, the sensor meets statutory requirements for temperature measurement and performance expectations. 

## **Highly Accelerated Corrosion Test (HACT)** 

Highly Accelerated Corrosion Test (HACT) was developed by Delta (DK) and has been accepted throughout the marine shipping market to demonstrate long-term performance of electrical equipment exposed to this environment. Each day of HACT testing equates to 1 year of marine environment exposure. The JS8746 has exceeded 14 days of testing, substantially outperforming competitor products. 

## Applications 

- Marine container ship applications 

- Compressors 

- Condensing units 

- Heat pumps 

- Air conditioning 

- Refrigerated truck and trailer 

- Reefer containers 

## **Amphenol Advanced Sensors** 

## Features 

- HACT Exposure: +14 days 

- Temp Tolerance Rating: ±0.2°C and ±0.15°C 

- Temp Rating: -40°C to 120°C 

- Environmental Protection: IP68 

- Resistant to: Salt solutions, Ozone, UV and a variety of marine environment cleaning detergents 

- Inert to trace levels of airborne R134a refrigerant 

- Stainless steel hard shell, with class corrosion resistance A2 or better according to ISO3506 

- Double insulated cable, multicore copper conductors and tin-coated, conductors cross-sectional area 0.25 mm2 (23 AWG) min, configured as 19mm x 0.14mm 

- Crimp caps, tin-coated brass, with integral strain relief for the conductor 

## JS8746 Specifications 

## **Resistance at 25ºC:** 

10,000 Ω nominal 

## **Thermal Equilibrium Temperature Tolerance:** 

±0.2ºC or ±0.15ºC (Temperature Range: 0ºC to 70ºC) 

## **B25/85:** 

3977K nominal 

## **Withstand Voltage:** 

2.5kV rms for minimum of 1 minute, where a broadly sinusoidal wave-form at 50 Hz is applied between the stainless steel housing and the conductors of the cable.  A failure is recorded if the current exceeds 1mA. 

## **Temperature Range:** 

-40ºC to 125ºC 

## **Time Constant:** 

20 seconds or less to register 63% of a known temperature transient 

## **Housing:** 

Stainless steel hard shell, with class corrosion resistance A2 or better according to ISO3506 

## **Cable:** 

Double-insulated, multicore copper conductors and tin-coated conductors cross-sectional area 0.25 mm2 (23 AWG) min, configured as 19mm x 0.14mm 

## **Crimp Caps:** 

Tin-coated brass with integral strain relief for the conductor 

|Part<br>Number|L /<br>mm|K /<br>mm|Tolerance<br>0-70°C / ± °C|
|---|---|---|---|
|JS8746A-0.20|1000|50|0.20|
|JS8746B-0.20|2000|50|0.20|
|JS8746C-0.20|3000|50|0.20|
|JS8746A-0.15|1000|50|0.15|
|JS8746B-0.15<br>2000<br>50<br>0.15<br>~~TTT~~<br>~~TT SS TTT~~||||
|JS8746C-0.15|3000|50|0.15|



Thermal Equillibrium Resistance Versus Temperature Properties 

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## **Thermal Equillibrium Resistance Vs. Temperature Table** 

Note: Temperature tolerances for ±0.2°C between 0°C and 70°C are shown. 

**==> picture [492 x 637] intentionally omitted <==**

**----- Start of picture text -----**<br>
Temp R nom / R min / R max / R Tol R Tol Temp Tol Temp Tol<br>°C Ω Ω Ω - % + % + °C - °C<br>-40 333560 328250 338930 -1.59 1.61 0.24 -0.24<br>-35 241070 237420 244750 -1.51 1.53 0.24 -0.24<br>-30 176080 173550 178630 -1.44 1.45 0.23 -0.23<br>-25 129930 128160 131700 -1.36 1.37 0.23 -0.23<br>-20 96807 95560 98061 -1.29 1.30 0.22 -0.22<br>-15 72809 71922 73699 -1.22 1.22 0.22 -0.22<br>-10 55253 54617 55890 -1.15 1.15 0.21 -0.21<br>-5 42292 41834 42751 -1.08 1.09 0.21 -0.21<br>0 32639 32382 32897 -0.79 0.79 0.15 -0.15<br>5 25391 25139 25642 -0.99 0.99 0.20 -0.20<br>10 19902 19711 20093 -0.96 0.96 0.20 -0.20<br>15 15713 15567 15860 -0.93 0.93 0.20 -0.20<br>20 12493 12380 12606 -0.90 0.90 0.20 -0.20<br>25 10000 9912.2 10088 -0.88 0.88 0.20 -0.20<br>30 8055.9 7987.3 8124.6 -0.85 0.85 0.20 -0.20<br>35 6530.0 6475.9 6584.1 -0.83 0.83 0.20 -0.20<br>40 5324.6 5281.8 5367.5 -0.80 0.80 0.20 -0.20<br>45 4366.5 4332.4 4400.7 -0.78 0.78 0.20 -0.20<br>50 3600.5 3573.1 3627.9 -0.76 0.76 0.20 -0.20<br>55 2984.6 2962.5 3006.7 -0.74 0.74 0.20 -0.20<br>60 2486.6 2468.7 2504.5 -0.72 0.72 0.20 -0.20<br>65 2081.8 2067.2 2096.4 -0.70 0.70 0.20 -0.20<br>70 1751.1 1739.1 1763.0 -0.68 0.68 0.20 -0.20<br>75 1479.6 1468.8 1490.3 -0.72 0.73 0.22 -0.22<br>80 1255.6 1246.0 1265.2 -0.77 0.77 0.24 -0.24<br>85 1070.0 1061.4 1078.6 -0.81 0.81 0.25 -0.26<br>90 915.55 907.82 923.29 -0.84 0.85 0.27 -0.27<br>95 786.43 779.50 793.39 -0.88 0.88 0.29 -0.29<br>100 678.07 671.84 684.32 -0.92 0.92 0.31 -0.31<br>105 586.75 581.16 592.38 -0.95 0.96 0.33 -0.34<br>110 509.52 504.48 514.58 -0.99 0.99 0.35 -0.36<br>115 443.94 439.40 448.51 -1.02 1.03 0.38 -0.38<br>120 388.06 383.97 392.19 -1.06 1.06 0.40 -0.40<br>125 340.29 336.59 344.02 -1.09 1.10 0.42 -0.42<br>**----- End of picture text -----**<br>


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## **Amphenol Advanced Sensors** 

www.amphenol-sensors.com 

© 2019 Amphenol Corporation. All Rights Reserved. Specifications are subject to change without notice. Other company names and product names used in this document are the registered trademarks or trademarks of their respective owners. 

**AAS-920-747B   -   05/2019**