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Fluke TiS55+ Thermal Imager, 256 x 192, 550 C

Description

TiS55+ 256 x 192 thermal imager for proactive maintenance routines

The Fluke TiS55+ is a handheld thermal imager with a 256 x 192 detector (49,152 pixels), a 28 by 20 degree field of view and a 3.5 in touchscreen. It is the lower of two TiS+ models and is meant for technicians who start a preventive maintenance programme and want asset tagging, voice notes and IR-Fusion without the cost of a larger detector. Seven Star LLC supplies the TiS55+ in Oman and the GCC as an independent supplier in Muscat, not affiliated with the manufacturer.

The ordering list shows FLK-TiS55+ 27HZ, FLK-TiS55+ 9HZ and FLK-TiS55+ 9HZ/CN. The number before HZ is the frame rate, and the /CN version is a region-specific variant.

TiS55+ technical specifications

Parameter Specification
Manufacturer / part number Fluke / TiS55+
Infrared resolution 256 x 192 (49,152 pixels)
Field of view 28 ° x 20 °
Spectral band Approx. 8 µm to 14 µm
Thermal sensitivity 40 mK
IFOV 1.91 mRad
Focus Manual focus; minimum distance 0.15 m
Display 3.5 in touchscreen, 640 x 480 LCD
Temperature range -20 °C to 550 °C (not calibrated below -10 °C)
Accuracy ±2 °C or 2 %, whichever is greater, at 25 °C
Emissivity Top-ten material list plus numerical adjustment 0.01 to 1.00
Frame rate 9 Hz or 27 Hz models
Visible camera Up to 5 MP
Video Not available
IR-PhotoNotes Up to 1 extra visible image in the is2 file
User spot markers / boxes 3 adjustable spot markers / 3 adjustable measurement rectangles
Dew point Not listed
Memory About 500 images internal; SD card of 4 GB or more (over 1,000 images)
Battery Lithium-ion, 3.5 hours or more continuous without WiFi; charge in 2.5 hours or less
Operating / storage -10 °C to 50 °C / -20 °C to 50 °C without batteries
Enclosure / drop IP54 / 2 m
Size / weight Approx. 26.7 x 10.1 x 14.5 cm / 0.885 kg with battery
Warranty Two years standard

What the 256 x 192 detector of the TiS55+ means in the field

Using the stated angles, the TiS55+ sees a scene roughly 50 cm wide at one metre distance and 5 m wide at about ten metres, with each pixel covering about 1.9 mm per metre. That makes it suitable for a single breaker, a motor end shield or a pump coupling at a few metres, and less suited to distant overhead lines. Narrow field of view concentrates the pixels on the object but needs you to step back to take in a full panel.

Sensitivity of 40 mK allows small differences to be visible, such as a connection running a few degrees hotter than its neighbours. Compare similar components under the same load to judge them.

Functions that replace the clipboard

  • Voice annotation: up to 60 seconds per image through a Bluetooth headset connection.
  • IR-PhotoNotes: one extra visible photo of a nameplate or tag stored within the is2 file.
  • Asset Tagging: scan a QR code and following images are sorted by asset.
  • Auto capture: user-selectable time interval for is2 or JPEG images.
  • On-screen keyboard for typed notes after an is2 capture.

Choosing between the TiS55+ and the TiS75+

Both models record the same radiometric is2 stills and share the housing, screen and battery type, so training and accessories carry over from one to the other. A department can buy a mix, using the TiS75+ for engineers and the TiS55+ for technicians on routine rounds.

The TiS55+ omits video, dew point calculation and the larger marker count. It also ships with one smart battery, while the TiS75+ comes with two and a two-bay charger. If the work is stills of panels, motors and bearings, the TiS55+ is enough. If you need a wider 42 by 30 degree view or video, move to the TiS75+. If you need laser focus, look at the Ti300+ instead.

Selection checklist for the TiS55+

  • Confirm that a 550 °C maximum covers your process surfaces.
  • Select 27 Hz or 9 Hz.
  • Plan a second battery; only one is included.
  • Decide whether a Bluetooth headset is needed for voice notes.
  • Check that your software environment can open is2 files or use JPEG output.

Commissioning and care of the TiS55+

Charge the battery in the imager, set the language and units, and format the SD card in the camera. Use manual focus on every shot and avoid reflective surfaces without adjusting the reflected temperature. Wipe the lens with a soft cloth only. The camera is rated IP54 and tolerates a 2 m drop, but it should not be left in direct sun inside a vehicle, since operating temperature is limited to 50 °C. A two-year calibration interval is recommended.

Typical applications of the TiS55+ in Oman and the GCC

Building services teams use the TiS55+ to find loose connections in distribution boards and overheating motors on pumps and fans. In industrial plants it supports routine route inspections of motor control centres, small transformers and steam traps. Summer ambient heat narrows the temperature difference between a faulty and a healthy part, so inspect during peak load and record the ambient temperature.

Information to send with an RFQ for the TiS55+

  • Part number TiS55+ and frame rate (27 Hz or 9 Hz)
  • Quantity and extras such as second battery, charger or headset
  • Typical targets and distances
  • Delivery location and time frame
  • Calibration certificate needs

Storage, handling and spares for the Fluke TiS55+

Keep the Fluke TiS55+ in its carrying case when it is not in use, and store it in a clean, dry place. Remove or charge the batteries as recommended in the user manual before long storage. Field teams in Oman and the GCC should avoid leaving the instrument in a vehicle in the sun, as high cabin temperatures can exceed the storage range and shorten battery life.

  • Check the instrument, cables, hoses or lenses for damage before each job.
  • Clean the unit with a soft, slightly damp cloth only; do not use solvents unless the manual allows them.
  • Plan a calibration interval that matches your quality system, and keep the calibration certificate with the asset record.
  • Order wear parts and accessories, such as batteries, test leads, hoses or adapters, together with the instrument.

For calibration and test work, it helps to state in your RFQ whether you need an accredited calibration certificate with the Fluke TiS55+, so the right documents can be confirmed with the quotation.

Documents and quotation

A combined datasheet for the TiS55+ and TiS75+ is attached on this page.

Send the part number TiS55+, the frame rate and the quantity, and we will confirm availability and a quotation.

Other Models in the Fluke Tis Plus Thermal Range

Seven Star LLC supplies models from the Fluke Tis Plus Thermal range in Oman and the GCC. Compare the related models below and request a quote for the one that matches your application.

ModelCategory
Fluke TiS75+ Thermal Imager, 384 x 288, 550 CPortable Test & MeasurementView details
Fluke TiS55+ Thermal Imager, 256 x 192, 550 CPortable Test & MeasurementYou are viewing this model
Datasheets & Documents
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About brand

Fluke is the American maker of handheld electronic test tools: digital multimeters, clamp meters, insulation testers, process calibrators, thermometers, vibration meters and power quality analysers. John Fluke founded the John Fluke Engineering Company in Springdale, Connecticut, in June 1948 and moved it to Seattle in 1952. Fluke is headquartered in Everett, Washington, was acquired by Danaher in 1998 and has been part of Fortive since Fortive's spin-off from Danaher in 2016.

Seven Star LLC lists Fluke process calibrators, electrical test tools and bench calibrators, and sources them for maintenance teams and calibration laboratories in Oman.

Fluke company profile

Founded June 1948, Springdale, Connecticut, USA, as the John Fluke Engineering Company
Founder John M. Fluke Sr.
Headquarters Everett, Washington, USA (moved to the Seattle area in 1952)
Ownership Danaher from 1998; part of Fortive (NYSE: FTV) since July 2016
Product families Digital multimeters and clamp meters, insulation resistance testers, process and loop calibrators, infrared thermometers and thermal imagers, vibration meters, power quality analysers, Fluke Calibration laboratory standards

Milestones

  • 1948: John Fluke starts the company in Springdale, Connecticut.
  • 1952: The company moves to Seattle
  • 1987: A joint venture with Philips leads to the ScopeMeter handheld oscilloscope.
  • 1998: Danaher acquires Fluke.
  • 2016: Fluke becomes part of Fortive, spun off from Danaher in July.

Fluke calibrators and test tools listed

The main Fluke products on this page fall into three groups, besides other test tools such as further multimeters, a thermometer, an anemometer, a vibration tester and a portable appliance tester:

  • Process tools: the 754 documenting process calibrator with HART, 789 ProcessMeter, 721 dual sensor pressure calibrator and 729 automatic pressure calibrator
  • Electrical test: the 376 FC true-RMS clamp meter with iFlex probe and the 1587 FC insulation multimeter
  • Fluke Calibration bench standards: 5522A, 5502A, 5500A and 5080A multi-product calibrators, the 5720A multifunction calibrator, 8508A reference multimeter, 6100A electrical power standard and 9640A RF reference source

Several of the bench models belong to earlier generations. When a model is no longer produced, we check the manufacturer's documentation and propose the successor it names.

Where Fluke instruments are used

Fluke process calibrators are used for loop checks, transmitter calibration and valve tests in oil and gas, power and water plants. Clamp meters and insulation testers serve electrical maintenance on motors, switchgear and cables. The bench calibrators and reference multimeters are the working standards of electrical calibration laboratories in the GCC, where they calibrate multimeters, clamp meters, process tools and power analyzers.

Fluke products we list

Family Examples
Portable Test & Measurement 117 Electrician’s True-rms Multimeter with, 1507 Insulation Resistance Tester, 1550C 5 kV Insulation Resistance Tester, 1587 FC Insulation Multimeter, 376 FC True-RMS AC/DC Clamp Meter with iFlex, 5080A Multi-Product Calibrator, 5500A Multi-Product Calibrator, 5502A Multi-Product Calibrator and 17 more
Lubrication & Bearing Maintenance 805 FC Vibration Meter

Ordering Fluke instruments: what we need

Send the exact model with its suffix, since versions differ. A Fluke 721, for example, is defined by its two pressure ranges, and a 729 by its maximum pressure. For bench calibrators, list the options you need, such as oscilloscope calibration or power quality options, the line voltage, and the type of calibration certificate you require from the manufacturer. For Fluke multimeters and clamp meters, add the kit contents wanted, such as probes, leads or cases.

Frequently requested Fluke models: Fluke 5522A Multi-Product Calibrator.

Facts checked against published histories of Fluke Corporation and Fortive, October 2026.

FAQ

Questions about the Fluke TiS55+ Thermal Imager, 256 x 192, 550 C

Answers from our engineering team on installation, compatibility and integration.

01What is the detector resolution of the Fluke TiS55+?
The TiS55+ has a 256 x 192 detector with 49,152 pixels, a 28 by 20 degree field of view and a 1.91 mRad IFOV with the standard lens.
02Does the TiS55+ record video?
No. The datasheet lists no video recording for the TiS55+. It stores still images as non-radiometric BMP or JPEG, or fully radiometric is2 files.
03How many batteries come with the TiS55+?
The datasheet lists one rugged lithium-ion smart battery with the TiS55+, while the TiS75+ comes with two and a two-bay charger. Extra batteries are an accessory.
04What is the temperature range of the TiS55+?
The TiS55+ measures from -20 °C to 550 °C and is not calibrated below -10 °C. Accuracy is 2 °C or 2 %, whichever is greater, at 25 °C ambient.
05What focus system does the TiS55+ use?
It uses manual focus with a minimum focus distance of 0.15 m. It has no laser distance meter, so the user focuses on the target before capturing each image.