Optris CT LT15CB15 Infrared Pyrometer – 15:1 Temperature Sensor
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Product Information
The Optris CT LT15CB15 is an infrared temperature measurement system for continuous, non-contact monitoring of heated, moving or inaccessible targets in industrial machinery and process automation. It combines a miniature sensing head with a separate electronic box connected by a dedicated 15 m high-temperature cable. The system measures from -50 to 975 °C, provides 15:1 optical resolution and operates across an 8 to 14 µm spectral range, making the LT15CB15 identifiable as an Optris CT infrared pyrometer for PLC-based temperature monitoring.
A replacement consists of the sensing head, electronic box and the matching 15 m cable configuration. The electronic box supports selectable analog output formats, while optional plug-in interface modules add USB, RS232, RS485, CANbus, PROFIBUS-DP or Ethernet communication. Commissioning can be carried out with Optris CompactConnect software or the electronic-box programming keys, including parameterization, emissivity adjustment and range scaling. Configuration is retained in non-volatile internal EEPROM memory, but the replacement must match the applicable CT LT calibration, optic ratio and model requirements before being returned to service.
For troubleshooting, the Optris CT LT15CB15 can be checked through the CompactConnect diagnostic view, the integrated electronic-box 3-digit LCD display and self-diagnostic messages shown by the electronic box. Analog Output Channel 2 can provide sensing-head temperature or an alarm output. When replacing a unit, verify the sensing head, electronic box, calibrated cable, selected analog-output format and any installed communication module before commissioning the spare.
Technical Specifications
| Manufacturer | Optris |
| Part number | CT |
| Model/type | LT15CB15 |
| Component type | Infrared temperature measurement system |
| Product family | Optris CT |
| Temperature measurement range | -50 to 975 °C |
| Optical resolution | 15:1 |
| Spectral range | 8 to 14 µm |
| Response time | 150 ms |
| System accuracy | ±1.0% or ±1.0, whichever is greater |
| Repeatability | ±0.5% or ±0.5, whichever is greater |
| Supply voltage | 8 to 36 V DC |
| Interconnecting cable length | 15 m |
| Analog Output Channel 1 | Selectable 0-20 mA, 4-20 mA, 0-5 V, 0-10 V, thermocouple J or thermocouple K |
| Analog Output Channel 2 | 0-5 V or 0-10 V sensing-head temperature output, or alarm output |
| Optional digital interfaces | USB, RS232, RS485, CANbus, PROFIBUS-DP or Ethernet via plug-in interface module |
| System architecture | Separate miniature sensing head and electronic box connected by a dedicated high-temperature cable |
| Protection rating | IP65; NEMA 4 |
Programming and Configuration
Optris CompactConnect software and the electronic-box programming keys are used for parameterization, emissivity adjustment, range scaling and calibration-related functions. The electronic box also provides an integrated 3-digit LCD display for local access to settings and operating information.
Configuration is retained in non-volatile internal EEPROM memory. During replacement commissioning, transfer or restore the required operating parameters and confirm the selected analog-output format, measurement range and emissivity settings before connecting the unit to the machine control system.
Communication and System Integration
The electronic box provides configurable analog integration for PLCs, controllers, recorders and alarm systems. Analog Output Channel 1 can be selected as 0-20 mA, 4-20 mA, 0-5 V, 0-10 V, thermocouple J or thermocouple K. Analog Output Channel 2 can provide a 0-5 V or 0-10 V sensing-head temperature signal, or an alarm output.
Optional plug-in digital interface modules provide USB, RS232, RS485, CANbus, PROFIBUS-DP or Ethernet connectivity. These interfaces support configuration, monitoring, data logging and fieldbus integration, depending on the installed module.
Diagnostics and Status Indication
Diagnostic information is available in the Optris CompactConnect software diagnostic view and through self-diagnostic messages shown on the electronic box. The integrated 3-digit LCD display provides a local indication of the electronic-box status and operating information.
For a first troubleshooting check, review the electronic-box messages and CompactConnect diagnostic view, then confirm the sensing-head temperature signal on Analog Output Channel 2 when that output is configured for head-temperature monitoring. Also check the selected output configuration and the connection between the sensing head and electronic box.
Replacement and Spare Part Considerations
Verify the complete Optris CT LT configuration before ordering a spare. The sensing head and electronic box must match the applicable calibration, optic ratio and LT model requirements, and the specified 15 m cable is part of the calibrated configuration. Optional digital interface modules and the selected analog-output formats must also match the machine installation.
After installation, restore or confirm the stored configuration, including parameterization, emissivity adjustment and range scaling. Check the supply voltage of 8 to 36 V DC, the output wiring and the communication module before returning the infrared temperature measurement system to service.
Frequently Asked Questions
What is the measurement range of the Optris CT LT15CB15?
The Optris CT LT15CB15 measures non-contact temperatures from -50 to 975 °C.
What optical resolution does the LT15CB15 provide?
The LT15CB15 provides 15:1 optical resolution and uses an 8 to 14 µm spectral range.
Which analog outputs are available?
Analog Output Channel 1 is selectable as 0-20 mA, 4-20 mA, 0-5 V, 0-10 V, thermocouple J or thermocouple K. Channel 2 can provide a 0-5 V or 0-10 V sensing-head temperature output, or an alarm output.
Which communication interfaces can be fitted?
Optional plug-in interface modules provide USB, RS232, RS485, CANbus, PROFIBUS-DP or Ethernet connectivity.
How is the LT15CB15 configured during replacement commissioning?
Configuration can be performed with Optris CompactConnect software or the electronic-box programming keys. Parameters are retained in non-volatile internal EEPROM memory, and the replacement must match the applicable calibration, optic ratio and model requirements.
How can the Optris CT LT15CB15 be checked during troubleshooting?
Use the CompactConnect diagnostic view, the electronic-box 3-digit LCD display and the self-diagnostic messages. Analog Output Channel 2 can also be used for sensing-head temperature monitoring when configured for that function.
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