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.
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. Employing materials and build standards that
enhance the sensor’s ability to withstand water ingression and degradation by the marine environment, 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
• Transportation of goods by land, sea and air
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 mm
2
(23 AWG) min, configured as 19mm x 0.14mm
• Crimp caps, tin-coated brass, with integral strain relief for
the conductor
Amphenol
Advanced Sensors
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 mm
2
(23 AWG) min, configured as 19mm x 0.14mm
Crimp Caps:
Tin-coated brass with integral strain relief for the conductor
Part
Number
JS8746A-0.20
JS8746B-0.20
JS8746C-0.20
JS8746A-0.15
JS8746B-0.15
JS8746C-0.15
L/
mm
1000
2000
3000
1000
2000
3000
K/
mm
50
50
50
50
50
50
Tolerance
0-70°C / ± °C
0.20
0.20
0.20
0.15
0.15
0.15
Thermal Equillibrium Resistance Versus Temperature Properties
2
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