Cryogenic Freezer Temperature Monitor with Alarm Indication

T° Sentry Model 140-200 Product Information


T-Sentry 140 RB Ultra Cold Freezer Temperature Monitor Alarm
Click image to enlarge.

Key Features:

  • NIST-traceable Type T thermocouple temperature probe (-200 °C to +50 °C).
  • Easy-to-read LCD display, 1-degree °C or °F resolution.
  • Adjustable high/low alert condition settings and alarm delay period.
  • Audible and visual alarms.
  • Selectable audible alarm mute periods.
  • Optional SPDT relay contact output with adjustable relay delay period.
  • Available temperature outputs: 4 to 20 mA, voltage, RS-232, RS-485, TCP/IP (Ethernet), etc.
  • NiMH battery backup.
  • Passcode protected setpoints.

Product Overview:

The T° Sentry Model 140-200 is a standalone, continuously monitoring, single-probe, NIST-traceable temperature verification system with built-in alert status notification for measuring ultra-low temperatures in ULT freezers and cryogenic LN2 Dewars.  The temperature sensing probe is a durable Type T thermocouple housed in a 3-inch stainless steel sheath.

The Model 140-200 is used to ensure that cold-chain storage temperatures are maintained for in-vitro fertilization (IVF) materials, viruses, vaccines, and other biological materials..

This unit enables operators to ensure that desired cold-chain temperatures are maintained for the ultra cold storage of viruses, vaccines, IVF (in-vitro fertilization) materials, and other biological materials.

If compliance documentation is required, the T° Sentry Model 140-200 can be optionally integrated into our PC-based networked T° Sentry ALERT Monitoring System for data logging, statistical process control (SPC), and alert email/SMS text notification .

The T° Sentry Model 140-200 is wall-mountable with dimensions of approximately 5" wide x 4.25" high x 1.75 deep. It uses a small plug-in power supply for operation.


Above Video: Setting up the Model T-140 Series.

Detailed Specifications:

  • Operating range of -200 to +50 °C (-328 to +122 °F) with an accuracy of +/-2 °C (4 °F) using a Type T thermocouple with a 3" stainless steel sheath and a 10' lead.
  • Power Supply: 120-240 VAC universal switching.
  • Black Bakelite Case: 5" wide x 4.25" high x 1.75" deep.
  • Mounting: wall mount with VELCRO® or stand on bottom edge.

Available Options:

  • R – SPDT Relay Dry Contacts: normally open (NO) or normally closed (NC), user-adjustable delay period.
  • B – 9V Rechargeable Battery Backup: 8.4 V NiMH, 160 mAh, 2 mA built-in trickle charger.
  • I – Current Output (4 to 20 mA): receiver-powered (RP) or self-powered (SP) .
  • F – Fahrenheit °F Display.
  • SW – Door Switch Input: door closes: alarm active, door open: alarm inactive.
  • PC – Passcode Protected Setpoints.
  • V – Voltage: 10 mV per 1° or 0.0 to 1.0 V.
  • D - Digital Output: RS-232 or RS-485.
  • E – Ethernet: 10/100 Base-T TCP/IP output to T° Sentry ALERT Monitoring System data logging sotware.
  • Extra Loud Audio Alarm: 100 dB vs standard 90 dB at 10 cm.
  • Large Display Panel for cabinet mounting.

Related Products:

  • AD 2000 Auto Dialer (Model AD 2000): Dials a phone/pager upon alarm condition.
  • Remote Alarm Delay Module (Model ADM 215).
  • Product Simulator Probe Bottle (A02000): 4-ounce freezer/refrigerator thermal mass simulator.
  • Interlocking Wall Mounting Bracket (PN 68034).

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