Sentry IT 32 Channel Controller

Sierra Monitor's Sentry IT 32 Channel Controller is a powerful network-enabled hazardous gas detection system controller that can operate up to 32 detectors and interface with devices over Modbus RTU, analog 4-20 mA, Sentry PSG Bus, and conventional dry contact. As part of the Sentry IT line, the Sentry IT Controller is compatible with the Classic Sentry, Sentry IT detectors, such as the 5100-XX-IT series, and other third party sensors and devices.

With its modular internal design, users can select just those I/O components that are needed for their application without adding multiple external boxes. The Sentry IT controller's large, touch sensitive, and easy-to-read color panel, along with a simple menu-driven configuration approach makes it easy to configure and operate the system. In addition, the controller easily integrates with plant-wide distributed control systems, PLC's, personal computers, tablets, and smartphones to provide the necessary data and alarms. The embedded Web application enables management and technicians to view important data remotely and provides connectivity into the Industrial Internet of Things (IIoT).

The Sentry IT 32 Channel Controller is approved and certified by a variety of third party agencies, including UL, SIL 2, FM, ATEX, and CE. These approvals and certifications assure our customers that we carry only the highest quality of products and performance.


The Sentry IT Controller supports GlobalCal™, our unique global calibration feature that allows a single technician to calibrate detectors from the Sentry IT Controller. With GlobalCal, a technician can complete the calibration activity at the controller location without needing to access the sensor modules. Multiple sensors can be connected to a single controller, allowing groups of sensors to be calibrated at the same time. Standard gas is applied remotely, using permanently installed tubing, rather than direct delivery to the sensor.

This simplified, non-intrusive approach eliminates travel time back and forth to each gas detector. It also increases convenience and safety, even in hard-to-reach or dangerous areas. Because calibration is done at the controller, sensors can be calibrated from floor level or outside enclosures, without having to physically access the sensor itself.

GlobalCal reduces labor costs associated with calibration. The need to shut down active process areas for calibration consequently costs facilities thousands of dollars in lost production time. GlobalCal, with its remote and non-intrusive methods, allows production to continue during the calibration process, thus avoiding the costs of lost production. In addition, factory-authorized service technicians performing gas detector calibration save time and costs by remotely calibrating all gas detectors at once from the Sentry IT Controller.

To learn more about global calibration, read The Effects of Improved Calibration »


SenseSafe™, our diagnostics feature, provides the Sentry IT Controller the ability to consistently monitor connected Sentry IT gas detection sensor performance for safety and maximum lifetime. With controller-based network diagnostics and remote command capability, SenseSafe gives management and technicians another tool to manage the facility.

The Sentry IT Controller uses SenseSafe to connect to resident DSP (Digital Signal Processing) in each of our Sentry IT gas detection sensor for comprehensive and continued monitoring. Statistical analyses and error condition logging can help prolong a sensor’s life by providing accurate calibration intervals.

As industries increasingly move toward more enterprise wide systems that incorporate IoT functions such as network connectivity and cloud data analytics, SenseSafe grants users the ability to oversee and diagnose all connected sensors within a facility.

Sentry InSite

The Sentry IT Controller supports Sentry InSite, our intuitive web-based monitoring appliance that provides safety managers and engineers with the ability to locally and remotely access their facility’s fire and gas safety system online.

Learn more about Sentry Insite »

Sentry IT 32 Channel Controller

  • GlobalCal™ – Non-intrusively calibrate all connected sensors at the same time
  • SenseSafe™ – Consistently monitor connected Sentry IT gas detection sensor performance for safety and maximum lifetime
  • Touch-Panel Computer – Easily operate and configure intelligent data
  • Backup Battery – Provide the desired stand-by power in the event of a power outage
  • Network compatible with Modbus RTU, 4-20mA, and other sensor communications: Easily install in a variety of field applications and easily obtain critical safety information wherever needed
  • Protocol Compatibility – Seamlessly interface with external control systems using multiple supervisory protocols such as BACnet, Modbus TCP, LonWorks, and more
  • USB Flash Drive – Quickly configure and upgrade new software
  • Sentry Compatibility – Interconnect with all Sentry IT products, legacy Sentry products, and third party sensors and devices
  • Connectivity – Connect with up to 32 module addresses

Specifications for Sentry IT 32 Channel Controller

Model Number

  • 5000-32-IT


  • AC Version: 120/240 VAC +/- 10%, 50/60 Hz
  • DC Version: 24VDC Nominal (18-30 VDC)
  • Power Consumption: Controller 50W, Typical Max System 200W
  • Battery Backup Capability: External option


  • Operating Temperature: -14 to 131 oF (-10 to 55oC) *
    • Check with factory for applications outside of 32 to 122oF (0 to 50 oC)
  • Storage Temperature: -4 to 140 oF (-20 to 60oC)
  • Relative Humidity: 0-95% Non-condensing


  • Type: 5.7” color, backlit touch-screen
  • Environmental rating: NEMA 4
  • Views: Bar charts, text data screens, configuration screens
  • Other indicators: Integral long-life, high-intensity LED lights for Safe, Warning, Alarm, and Trouble

Connectivity to external controls and systems

  • Controller to Ethernet: Modbus TCP/IP or EtherNet/IP (other protocols available)
  • Optional – Remote management: Web browser interface
  • Optional – Mass storage: Flash drive via USB port

Connectivity to modules

  • Channels: Up to 32 module addresses
  • Channel power: 24VDC
  • Communication:
    • Analog 4-20 mA: 2, 3, or 4-wire per ISA specifications
    • Modbus RTU (Sentry IT): RS-485 (half-duplex)
    • SentryBus: Proprietary Power, Signal, Ground (PSG)
    • Binary Input: Supervised or Digital Input


  • 4-20 mA: Variable retransmission 3-wire or 4-wire
  • Relay: User Configurable, SPDT (multiples of 8)
  • Standard: 5 Amps
  • Optional: 8 Amps
  • Trouble: 5 Amps, Fail-safe


  • Design: Wall-mount
  • Material: Painted mild steel, 316SS, or GRP
  • Dimensions (HxWxD):
    • NEMA 1: 18 x 14 x 6 inches (45.7 x 35.6 x 15.2 cm)
    • NEMA 4 SS: 20.5 x 14.4 x 8.2 inches (52.1 x 36.6 x 20.6 cm)
  • Weight:
    • NEMA 1: 30.0 lbs, (13.6 kg) Typical
    • NEMA 4 SS: 35.0 lbs (15.9 kg) Typical
  • Rating: NEMA 1 Standard (NEMA 4 or optional NEMA 4X)

How to Purchase the Sentry IT Controller

Find Your Local Sales Partner

We work with a variety of sales partners around the world to increase our ability to reach customers. If you are looking to purchase the Sentry IT Controller (5000-32-IT), please contact the sales partner that covers your location: