Isotech TTI-22 two-channel precision thermometer, 0.001 °C accuracy, Pt100 and SPRT
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Quick overview
- Type: Calibration equipment
- Signal / Protocol: RS-232
- Hazardous area: General purpose
- Genuine productsSourced from the manufacturer or authorised channels
- Delivery across BangladeshDhaka, Chattogram and all industrial zones
- After-sales supportInstallation guidance and warranty handling
- Reply within 24 hoursCall +880 1713 552466 or email hello@argonmark.com
Specifications
| General | |
|---|---|
| Part no. | BD-1508 |
| Category | Oil & Gas Instruments |
| Group | Instrumentation & Control |
| Brand | Isotech |
| Model | TTI-22 |
| Technical | |
| Type | Calibration equipment |
| Signal / Protocol | RS-232 |
| Hazardous area | General purpose |
Datasheet
Technical features
| Laboratory-level resistance thermometry in a portable, battery-powered unit | |
| Each reading performs zero and gain correction against a stable internal reference resistor | |
| Switched-polarity DC current (0.4 mA) eliminates thermal EMFs; no mechanical relays | |
| Stores up to 30 probe calibrations with expiry dates and warns when a calibration is due | |
| Ratio measurement of the two channels; built-in statistics (mean, standard deviation) | |
| Cal Notepad logging software included; works with I-CAL Easy for automated comparison calibration |
Applications
| Reference thermometer for comparison calibration in liquid baths and dry blocks | |
| Secondary laboratory and industrial precision temperature measurement |
Key specifications
| Inputs | 2 channels: Pt100 (IEC 60751), 25.5 / 100 Ω SPRT (ITS-90) |
|---|---|
| Range | −250 to 960 °C (0–440 Ω) |
| Accuracy | 0.001 °C (1 mK), instrument only |
| Resolution | 0.0001 °C / 40 µΩ |
| Interface | RS232, Ethernet with built-in web server |
| Power | 7.5 V DC adaptor or 2 × AA (> 10 h) |
Specification
| Inputs | 2 channels; Pt100 (BS EN 60751 / IEC 751); 25.5 Ω and 100 Ω SPRTs to ITS-90 |
|---|---|
| Measuring current | 0.4 mA; self-heating test current 0.29 mA |
| Measuring time | 1.44 s for both channels |
| Measuring range | −250 to 960 °C (0 to 440 Ω) |
| Resolution | 0.001 °C (100 Ω PRT); 0.00004 Ω |
| Uncertainty (instrument only) | 0.001 °C (1 mK) for 100 Ω PRT |
| Reference resistor | Internal 380 Ω; TCR ±0.3 ppm/°C; stability ±5 ppm/year (≈ ±1.3 mK/year for Pt100 at 0 °C) |
| Interface | RS232, Ethernet, built-in web server |
| Ambient temperature | 10 to 30 °C |
| Power | 7.5 V DC 250 mA adaptor or 2 × AA batteries (> 10 h) |
| Dimensions | 190 W × 112 H × 240 D mm |
| Weight | 1.8 kg |
Notes
| Data from the manufacturer's published datasheet. Confirm model, range, materials and approvals with Argonmark before ordering. |
Photo: courtesy of Isotech, used with permission (source) — background removed by Argonmark. All photo credits
Description
The Isotech TTI-22 is a two-channel precision thermometer for Pt100 probes and 25.5 or 100 Ω SPRTs, measuring from −250 to 960 °C with an instrument accuracy of 0.001 °C and a resolution of 0.0001 °C. Every reading is corrected against a highly stable internal reference resistor, and a switched-polarity 0.4 mA current removes thermal EMF errors.
It stores up to 30 probe calibrations with due-date warnings, can measure the ratio between its two channels, and has RS232 and Ethernet with a built-in web server. It runs for over 10 hours on two AA cells, making it a practical reference standard alongside calibration baths and dry blocks.
Argonmark Ltd supplies Isotech instruments across Bangladesh — Dhaka, Chattogram, Gazipur, Narayanganj and the gas fields, refineries, terminals and power plants beyond. Send us the model, range, process connection, output and any hazardous-area requirement, and we will confirm the right configuration, lead time and price.
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