Cryogenic Control Systems Inc.


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Model 18I Cryogenic Temperature Monitors

The Model 18I has eight independent and multi-purpose sensor inputs. Virtually any cryogenic temperature sensor from any manufacturer can be selected by a single setting of the front panel.

Front Panel


  • Eight independent multipurpose input channels support Diode, Platinum RTD and most cryogenic NTC temperature sensors.
  • Operation from 500mK to over 1,200K with appropriate sensor.
  • Large, bright highly configurable TFT-LCD display.
  • Two big 10A dry-contact relay outputs.
  • Flexible input power: Power-Over-Ethernet or external 7.5-24V AC/DC.
  • Continuous data logging into internal Non-Volatile memory.
  • Remote interfaces include Ethernet and RS-232.

Rear Panel


  • Input Connectors: Four DB9 receptacles provide 4-wire measurement connection plus shield for eight, four or two input channels.
  • Ethernet: RJ-45 with Power-Over-Ethernet and LAN activity indicator LEDs.
  • RS-232 port connector, DB9.
  • Power jack, 7.5 to 48V AC/DC external power.
  • Relay #1 and #2 connection, detachable terminal block.

Auto-ranged, Constant-VoltageAC excitation provides robust support for cryogenic Negative Temperature Coefficient (NTC) sensors including Ruthenium-oxide, Carbon-Glass, Cernox™, Carbon-Ceramic, Germanium and several others.

Positive Temperature Coefficient (PTC) resistor sensors including Platinum and Rhodium-Iron RTDs use constant-current, AC excitation.

Silicon Diode sensors are supported over their full range by using 10uA constant-current DC excitation.

User memory is available for custom or calibrated sensors.

The front panel consists of a large, bright TFT-LCD display and a 4-key keypad. Most features and functions can be accessed via this simple and intuitive menu driven interface.


The display is highly configurable. All eight temperature readings can be shown simultaneously in a small font or two selected channels in a large font.

Temperature data may be continuously logged into a large internal buffer. Data is time-stamped and saved in non-volatile memory.

The IEEE 802.3af Power-over-Ethernet (PoE) specification is supported allowing the monitor to be powered by it’s local area network connection. Since PoE provides both power and data over a single cable, remote data acquisition and high channel count systems are simplified.

Two 10.0 Amp dry-contact relay outputs are available that can be asserted based on temperature setpoints from user selected input channels. These relays are large enough to switch most cryogenic valves.

Visual, remote and audible alarms may be programmed to assert based on temperature setpoints. E-mail may be sent based on selected alarm conditions.

The Model 18I’s Ethernet interface connects directly to any 100/10 Base-T Ethernet Local-Area-Network.

An embedded web server allows the monitor to be viewed and configured from any web browser.

TCP and UDP data port servers bring fast, reliable remote control to common data acquisition software programs including LabView™.

An RS-232 serial interface allows simple connectivity for non-networked systems.

A full IEEE-488.2 GPIB interface is available as a compact external option that connects to the Ethernet LAN port. USB 2.0 serial port emulation is also optional.

Remote interfaces implement an IEEE-488.2 SCPI compliant remote command language that is easy to learn and easy to read. This language is identical across all Cryo-con products to ensure that your investment in system software is always protected.

Labview drivers are available for all remote interfaces.


Cryogen-Free systems:

  • Up to eight input channels.
  • Two High current relay outputs.

General purpose laboratory:

  • Eight inputs support virtually every cryogenic temperature sensor offered by every manufacturer.
  • Ethernet connectivity for ease of remote control.
  • Internal data logging.
  • Temperature activated relays and alarms. E-mail on alarms.
  • Instrument status and control via a standard web browser.

Distributed Instrumentation

  • Ethernet facilitates separation of instruments over great distances so the instrument can be moved closer to the temperature sensors.
  • Many instruments can be connected to a single LAN.
  • Power-Over-Ethernet simplifies power distribution.

Superconducting Magnets:

  • Cryogen-Free magnet systems require many sensor inputs.
  • Robust support for the NTC temperature sensors that are commonly used in magnet systems.
  • Internal data logging to NV memory records time stamped data and survives a power failure.

Data Acquisition / Computer control:

  • Ethernet interface.
  • Remote command language is SCPI and is identical across the entire product line, therefore ensuring your system software will not become obsolete.
  • LabView drivers for all remote interfaces

Industrial Control Systems

  • Directly interfaces to most industrial Programmable Logic Controllers (PLCs) .
  • Ethernet interface supports most industrial distributed instrumentation system protocols.
  • Flexible input power scheme, including Power-Over-Ethernet and 12 to 48 Volt AC/DC. External power module supplied.
  • Two High current relay outputs.
  • Robust implementation of the IEEE-488.2 SCPI command language facilitates system software development. and protects your investment in system software.

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