AM1758 Gradient PRT

 

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Description

AM1758 Gradient PRT

  • Vertical gradient measurement of dry block/dry well
  • 6 mm sensing element
  • Temperature range: -200 °C to 670 °C
  • Short term stability: ±0.003 °C at 0.01°C
AM1758 is specifically designed to measure vertical gradients of dry blocks or dry wells. The length of the sensing element is only 6 mm, which allows AM1758 to measure detailed temperature changes inside the dry wells with pin point precision.
The short sensing element has adopted many of AccuMac’s PRT technologies to offer a high level of stability across the temperature range from -200 °C to 670 °C. A uniquely designed support structure and filling material provides excellent balance between the hysteresis effect, mechanical shock and thermal shock performance.
It has long been a challenge for temperature calibration labs across the world to measure gradient of a dry block. With a 6 mm sensing element, AM1758 meets challenge and requirement such as one from The Euramet Calibration Guide CG-13 Version 3.0 “CALIBRATION OF TEMPERATURE BLOCK CALIBRATORS”

Features

  • Vertical gradient measurement of dry block/dry well
  • 6 mm sensing element
  • Temperature range: -200 °C to 670 °C
  • Short term stability: ±0.003 °C at 0.01°C

Specifications

Temperature Range
From -200 °C to 670 °C
Resistance at 0 °C
Nominal 25 Ω
Temperature Coefficient
0.003925 Ω/ Ω/°C
Short Term Stability (1)
±0.003 °C at -196 °C
±0.003 °C at 0.01 °C
±0.004 °C at 232 °C
±0.005 °C at 420 °C
±0.006 °C at 661 °C
Hysteresis
<=0.005 °C
Self-heating
0.0015 °C at 1 mA current
Response Time
9 seconds for 63% response to step change in water moving at 3 feet per second
Measurement Current
1 mA
Sensor Length
6 mm
Sensor Location
3 mm from tip
Insulation Resistance
>1000 MΩ at room temperature
Sheath Material
Inconeltm
Dimension
0.25 inch X 12 inch (6.35 mm X 305 mm)
External Leads
Teflontm –insulated copper wire, 4 leads, 2.5 meters
Handle Dimension
15 mm (OD) X 65 mm (L)
Handle Temperature Range (2)
-50 °C to 180 °C
Optional Calibration
NIST traceable calibration and data available per request: Ordering # 5007

(1) Maximum variation from PRT during gradient measurements up to 4 hours in the same heat source.
(2) Handle temperature outside this range will cause damage to the probe.

Optional Accessories

Model

 Description

9001

 Wooden Carrying Case included

Knowledge and Information

AM1758 Gradient PRT Datasheet