Thermal Vial™ RTD Temperature Sensing System

A New RTD temperature sensing system for laboratory refrigerators and freezers.

Thermal Vial™ RTD Temperature Sensing System Shown with Optional LCD Loop Powered IndicatorThe Thermal Vial™ (patent pending) is a new temperature sensing system for ultralow freezer, cryogenic storage, blood bank, and other medical and scientific storage applications to -200°C.

The system includes a precision 316 Stainless Steel Resistance Temperature Detector (RTD) probe, match calibrated 4-20 mA transmitter in a NEMA 4X sealed enclosure, ruggedized flexible cable, and a fluid-filled 175 ml (6 oz) vial that lets the sensor mimic the thermal response of other freezer contents. An integral loop powered LCD indicator is optional.

Freezer sensors are subject to false alarms when doors are opened and temperature momentarily rises. The Thermal VialTM container acts as a thermal ballast to delay reaction and provides a repeatable time response. It can be filled with cryopreservatives, alcohol, water, ethylene glycol solutions, or any other solution to accurately emulate the material being processed or stored.

The sealed Thermal VialTM eliminates the problems of spillage and contamination of contents because the probe does not contact the liquid in the vial. The large (50 mm x 50 mm) footprint provides extra stability on a shelf or rack, while allowing easy repositioning.

The RTD Thermal Vial Temperature Sensing System builds on existing Minco sensors with additional options such as vial size, multiple thermowell configurations and three levels of calibration accuracy to ensure that customer requirements are always satisfied.

NIST traceable certification of compliance and calibration data are provided at no additional charge.

Specifications for Thermal Vial™ RTD Temperature Sensing System

Thermal Vial™ RTD Temperature Sensing System Showing Enclosure Options Thermal Vial™ RTD Temperature Sensing System Showing Vial Options Thermal Vial™ RTD Temperature Sensing System Showing Accessory Options


Probe case: Stainless steel.

Element: Platinum.

Resistance (excluding leadwire resistance):
PM platinum: 100.00 Ω ±.06% at 0°C (32°F) (Class A).
PD platinum: 100.00 Ω ±.12% at 0°C (32°F) (Class B).
PF platinum: 1000.00 Ω ±.12% at 0°C (32°F).

TCR: .00385 Ω/Ω/°C nominal from 0°C to 100°C.

Operating temperature range:
Probe and vial: -200 to 120°C (-328 to 248°F).
Transmitter: -25 to 85°C (-13 to 185°F).

Insulation resistance: 1000 megohms minimum at 500 VDC, leads to probe case.

Leads: AWG #22, stranded, TFE insulated, with TFE jacket overall.

Thermal vial: Polyethylene bottle with cap.

Thermowell: Delrin material.

Transmitter: 4-20 mA output; 8.5 to 35 VDC loop powered.

Connection box: Polycarbonate enclosure, NEMA 4X.
How To Order
AS103282 Model number
PD Sensing element, .00385 TCR:
PM = 100 Ω Platinum ±.06%, Class A
PD = 100 Ω Platinum ±.12%, Class B
PF = 1000 Ω Platinum ±.06%
72 Cable length in inches
D Vial configuration:
S = Single thermowell, standard vial
D = Dual thermowell
T = Triple thermowell
M = Single thermowell, miniature vial
L = Single thermowell, large vial
C Connection box type:
C = Indicating °C
F = Indicating °F
B = Non-indicating
75 System accuracy:
75 = .75% of span
50 = .50% of span
20= .20% of span or .1°C, whichever is greater
EZ Temptran temperature range code:
EZ = -100/0°C (-148/32°F)
M = -50/50°C (-58/122°F)
C = 0/100°C ( 32/212°F)
More ranges available, contact us.
AS103282PD72D75CEZ = Sample part number