.Low total cost of ownership (TCO) compared to L-I-G thermometers

High accuracy (± 0.06˚C)

High resolution (0.001˚C)

Hazardous area use rating

Fast response

Data logging with optional BetaLOG™ TI software

Temperature trend indicator

Rugged and reliable

EFI/RFI standard compliant

Long battery life

User configurable features

Compact and lightweight

A single BetaProbe TI high precision digital thermometer can
replace many liquid-in-glass (l-i-g) thermometers. It can also serve as
a reference standard for other types of digital or analog temperature
indicators. Plus, intrinsically safe certification means it can be used
virtually anywhere.
The integral 3/16" (5 mm) diameter probe houses a quick response
thin film sensor for quickly acquiring highly accurate readings using
minimal insertion depth. The integral probe also rotates through
90° for any angle reading of the display.

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Calibrate thermometry bridges quickly,
simply and in-house

Calibrate ac and dc thermometry bridges

High accuracy - better than 0.1 ppm at 100 Ohms

Patented design licensed from IRL

Windows application for full analysis and reportin

The Resistance Bridge Calibrators employ a powerful combinatorial calibration method and a patented resistor network. The network generates 35 different four-terminal resistances from various series and parallel combinations of just four resistors. Analysing the combination measurements, combined with knowledge of the interrelationships between them, enables a complete calibration of your resistance bridge.

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Accuracy: ±0.005°C; (typically ±0.001°C at 001°C)

4 wire AC bridge for stability without recalibrating

User selectable resolution of up to 0.001°C or 0.0001 ohms over full range

Range: -200°C to +962°C depending on probe

2 channels as standard with optional 4 or 6 channels expandable up to an additional 64 channels with Switchboxes

ASL's F500 provides high accuracy, multi channel temperature measurement with Platinum Resistance Thermometers - PRTs - and uses AC bridge technology as developed by ASL for Standards Laboratories throughout the world. Model F500 requires no regular recalibration, the AC circuit techniques eliminating thermal EMFs and drift, while providing excellent long term stability. Front panel data entry allows you to enter probe calibration data into the F500's memory, so that thermometer resistance can be accurately converted to temperature in °C, °F or K. This can be password protected to prohibit unauthorised or accidental data entry. The combination of proven technology and sophisticated microprocessor control gives you a reliable, easy to use precision instrument.

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Accuracy: ±0.01°C; up to ±0.02°C with probe

4 wire AC bridge for stability without recalibrating

User selectable resolution of up to 0.001°C or 0.0001 ohms over full range

Range: -200°C to +962°C depending on probe

2 channels as standard with optional 4 or 6 channels expandable up to an additional 64 channels with Switchboxes

ASL's F252 provides high accuracy, dual channel temperature measurement with Platinum Resistance Thermometers - PRTs - and uses AC bridge technology as developed by ASL for Standards Laboratories throughout the world. Model F252 requires no regular recalibration, the AC circuit techniques eliminating thermal EMFs and drift, while providing excellent long term stability. Front panel data entry allows you to enter probe calibration data into the F252's memory, so that thermometer resistance can be accurately converted to temperature in °C, °F or K. This can be password protected to prohibit unauthorised or accidental data entry. The combination of proven technology and sophisticated microprocessor control gives you a reliable, easy to use precision instrument.

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Accuracy: up to ±0.01°C and resolution up to 0.001°C for high quality data

Dual channel with four inputs, 2x PRTs and 2x thermocouples for real versatility

Temperature Range: -210° to 2315°C for Thermocouples, -210° to 1100°C for PRTs

LCD display: Channels A, B or A-B in °C, °F or K

Battery operation plus built-in data logging for "go anywhere" applications

The F150 digital thermometer incorporates two inputs for resistance thermometers (RTD) and two for thermocouples. It has been designed for maximum versatility and to help fill your needs for high accuracy single or differential measurements with any combination of thermometers.
Temperature measurements in °C, °F and K, plus Ω or mV, are displayed on a large graphics LCD.
Use it anywhere - you can operate F150 by battery or AC power and store your measured data to internal memory for later retrieval.
Performance is assured with instrument accuracy of up to ±0.01°C and for best system accuracy, you can store RTD calibration data to enhance conversion of resistance to temperature. Similarly, for thermocouples you can choose one of the 10 industry standard linearisations in memory. F150 is supplied complete with calibration traceable to international standards.
To give rapid, accurate results the F150 has been designed to store calibration data for each of your regularly used probes.

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- High Accuracy Handheld Thermometer
- High Resolution, to 0.001°C
- High Accuracy to 0.01°C
- Perfect Standard for use with Isocal-6, Fast-Cal & Dry Blocks
The TTI-10 is a high accuracy handheld temperature indicator with two platinum resistance thermometer inputs. The high precision makes the instrument particularly suitable as a portable reference thermometer to use alongside Isotech temperature calibrators such as the Fast-Cal, Isocal-6 and Dry Block ranges. It is also suited for high accuracy measurements in industrial and scientific applications.

TTI-10 brings laboratory level performance of up to 10mK (0.01°C) and resolution up to 0.001°C in a portable handheld instrument. Battery life is typically 20 hours from a 9V PP3 battery and a protective rubber boot offers protection in field use.

The instrument can capture the minimum, maximum and average values over up to 4000 measurements with a logging rate selectable in the range of 1 second to 30 minutes.

The TTI-10 has an easy to use “learning calibration mode” that allows the TTI-10 to be system calibrated with a Platinum Resistance Thermometer simply by comparing it to a calibrated standard thermometer, no need to calculate coefficients or data, simply enter the reference probe temperature or temperatures and the TTI-10 does the work for you.

A USB interface allows connection to Isotech Cal Notepad software with its charting and logging features.

TTI-10 supports Isotech Semi Standard Platinum Resistance probes with system uncertainties (probe and instrument) as low as 20mK. We recommend the 935-14-61 and 935-14-16 probes detailed below and have special calibration deals available. Other probes and ranges are available, refer to Semi Standards – Platinum Resistance Thermometers

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-250°C to 960°C

5 to 10 times the performance of comparably priced instruments!

- ±0.001°C (1mK) accuracy
- 0.0001°C (0.00004Ω) resolution
- contains both RS232 and Ethernet ports
- 10 Hours Use from 2 AA batteries

Quite simply the Isotech TTI-22 High Accuracy Thermometer sets new standards in the price to performance ratio for industrial and secondary resistance thermometry. If you need high accuracy at an affordable price you have to look at the TTI-22.

The TTI-22 has an accuracy of 0.001°C and a resolution of 0.0001°C (0.00004 Ohms). It has two input channels, is lightweight (1.8kg) and will operate for more than 10 hours from two small AA cells. It has both RS232 and Ethernet ports.

Simple to use, supporting both Industrial 100 Ohm probe and SPRTs to ITS-90, 25.5 and 100 Ohm. Up to 30 probe calibrations can be stored along with the calibration expiry date so the instrument can warn when the calibration time has been exceeded.

Built in statistics calculation can show you both the measured and average values along with the standard deviation over previous measurements.

The Isotech TTI-22 is ideal as a reference standard alongside liquid calibration baths, for the smallest uncertainty calibration with Dry Blocks or for demanding stand alone measurement applications.

Previously this level of performance was confined to specialist laboratories with expensive thermometry bridges; TTI-22 delivers 5 to 10 times the performance of comparably priced instruments.

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PRT and Thermocouple Thermometer
-200°C to 2315°C (4199°C)
±0.01°C (±10mK) accuracy
Accepts Scanner Cards for up to 10 Channels of Measurement
- 0.001°C Resolution (Pt100 Inputs)
- PRT and Thermocouple Inputs
- Eliminates Unwanted Thermal EMFs with Current Reversal
- Stores 4000 Measurements
- PC Interface and Software Included, RS232
- 10 Hours Use from Internal Battery

The TTI-7 is a very high accuracy multi purpose digital thermometer for both platinum resistance thermometers and thermocouples. Laboratory users will welcome the features to eliminate Thermal EMF Errors and Self Heating Errors along with provision to store the calibration data of up to 20 PRT probes. The rugged aluminum case, internal battery pack and integrated power supply ensure reliable portable field use for demanding measurement applications all at great value.

Dual Channel Input allows a probe on Channel B to be calibrated against a standard on Channel A - directly compare any combination of PRT and Thermocouple. The TTI-7 supports ten thermocouple Types, B,C, D, E, J, K, N, R, S and T and Pt100 thermometers. Connect up to 16 sensors via the optional switchboxes, Model 954 and 958.

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The new microK family of precision thermometers set new world standards for accuracy and stability. Designed for a wide range of high accuracy industrial and scientific calibration applications, the instrument uses a completely new measurement technique to achieve accuracies better than 0.1 parts per million (ppm) - equivalent to 0.0001°C - when used with a standard platinum resistance thermometer (SPRT).
- Accuracy ±0.1ppm
- Zero drift for PRTs
- PRT, thermocouple and thermistor sensing
- <2 second measurement time
- Keep-warm currents
- 0-10mA sensor current
- Touch screen

The new microK family of precision thermometers set new world standards for accuracy and stability. Designed for a wide range of high accuracy industrial and scientific calibration applications, the instrument uses a completely new measurement technique to achieve accuracies better than 0.1 parts per million (ppm) - equivalent to 0.0001°C - when used with a standard platinum resistance thermometer (SPRT).

When used with a 0°C cold junction reference unit, or by measuring the junction temperature with a PRT on another channel the instrument is capable of low uncertainty precision thermocouple measurements, with a voltage uncertainty of just 0.25μV, equivalent to 0.01°C with a Platinum / Gold Thermocouple at 1000°C.

The microK range consists of four instruments offering a choice of measurement uncertainty from 0.1 to 0.8ppm, equivalent to 0.1mK to 0.8mK over the whole range of an SPRT with an Ro >2.5Ω.

The instruments in the microK range offer performance characteristics and features which are simply not available elsewhere. Comparable instruments available internationally do not achieve the same accuracy or stability (zero drift characteristics with SPRT measurements are not obtainable in any other instrument), other instruments do not support the same variety of sensors, and offer considerably less operational features. The microK family uses solid state construction with no potentiometers or relays which ensures long term reliability and low cost of ownership, a feature of growing international importance.

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- Range: -270°C to 1820°C (3308°F)
- Accuracy: ±0.005°C (±5mK) full range for PRTS
- Resolution: 0.0001°C (0.1mK)
- SPRT/PRT, Thermocouple, Thermistor and 4-20mA Inputs
- Full color graphical display
- Store up to 180 days of measurements
- Can control Isotech calibration baths
- 4 AA batteries or universal power supply

The milliK Precision Thermometer from Isotech sets a new standard for the high accuracy measurement and calibration of Platinum Resistance Thermometers, Thermistors, Thermocouple and Process Instrumentation (4-20mA) over the range -270°C to 1820°C.
In addition to low uncertainty measurements from Reference Standards and Industrial sensors, the milliK can control Isotech temperature sources, sequencing through a programmable list of temperature set points and log data to internal memory or a USB drive. The milliK forms the hub of a measurement system, reading SPRTs, RTDs, Thermistors, Thermocouples and 4 - 20mA current inputs with the option to control calibration baths and log readings.

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Range: –328 to 932°F (–200 to 500°C)
Accuracy: ±0.1°C (–100 to 200°C) otherwise ±0.2°C
Dimensions 5¾ x 31/3 x 1½
Weight: 400g

Oper. Temp: 0 to 50°C
Resolution: ±0.01°C (–100 to 200°C) otherwise ±0.1°C

• High accuracy
• Large illuminated display
• Hold, MAX, MIN, Average
• Automatic OFF
• One or two calibration points
• Real time clock
• °F/°C selectable
• Dual display, 1/2" numerals
• Four AA batteries, > 500 hour battery life
• Operating temperature 32 to 122°F
• Two-year warranty

Battery: 4 AA / Life > 500 hr

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Measuring range: -200 … 500 ° C
Accuracy: ± 0.1 ° C (-100 … + 200 ° C), otherwise ± 0.2 ° C (without sensor)
Dimensions: 147 x 85 x 37 mm
Weight Approx.: 400 g

• High accuracy
• Large illuminated display
• Hold, MAX, MIN, Average
• Automatic OFF
• One or two calibration points
• Real time clock
• °F/°C selectable
• Dual display, 1/2" numerals
• Four AA batteries, > 500 hour battery life
• Operating temperature 32 to 122°F
• Two-year warranty

Functions: HOLD/MAX/MIN/AVG/DATE/TIME/AutoOFF, CAL, POLY-CAL/°C, °F/display illumination
Temperature Channel 1:
Principle: Pt100 (4 wire)
Temperature Channel 2:
For Thermocouple-sensor Type K/J/N/E/R/S/T

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Measuring range -200 … 500 ° C
Accuracy ± 0.1 ° C (-100 … + 200 ° C), otherwise ± 0.2 ° C (without sensor)
Dimensions: 147 x 85 x 37 mm
Weight Approx.: 400 g

Operating temperature 32 to 122°F

• High accuracy
• Large illuminated display
• Hold, MAX, MIN, Average
• Automatic OFF
• One or two calibration points
• Real time clock
• °F/°C selectable
• Dual display, 1/2" numerals
• Four AA batteries, > 500 hour battery life
• Two-year warranty

Functions: HOLD/MAX/MIN/AVG/DATE/TIME/Auto OFF, CAL/°C, °F/display illumination
Temperature Channel 1: For Thermocouple-sensor Type K/J/N
Temperature Channel 2: For Thermocouple-sensor Type E/R/S/T

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Range: -200°C to +850°C, depending on thermometer probe
Accuracy: F100 only: ±0.02°C (±20mK)
Dimensions: 232mm(L) x 97mm(D) x 53mm(W) nominal.
Weight: 500g (1.1 lbs).

Resolution: 0.001°C
Stability: Long term: typically <0.002Ω per year (<0.005°C for Pt100)
Temp co-efficient: <0.00005°C per °C ambient change.
Data entry format: ITS90 and CvD for calibrated probes; or EN60751 for un-calibrated probes.
Probe current: 1mA switched d.c. (Pt100); Auto-select 1mA, 10uA and 3uA for thermistors.
Probe types: Pt100 and Pt25 resistance thermometers plus NTC thermistors. Cable length typically 2M.
Max cable length: 100 metres for Pt100; 30 metres for SMART Pt100.
Thermometer input: 2 x 5 pin industrial DIN socket with screw lock to connecting plug, accepting both normal and SMART probes.

• Common inputs for “SMART” & normal PT100 & Thermistor probes
• USB communications port as standard
• Display in °C, °F, K (Kelvin) or ohms
• Statistical functions: Average, Min/Max and Standard Deviation

Display: Backlit LCD.
Communications: USB interface.
User functions: Display hold, Display zero, One-shot measurement, Measurement log, Statistical analysis - min/ max, average, standard deviation.
Operating conditions: Full specification range: +15°C to +25°C.
Full operating range: 0°C to +40°C <80%RH non-condensing.
Power: Nickel-Metal Hydride (Ni-MH) rechargeable battery.
Charging socket built-in Low battery indicator.

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Range: -200°C to +850°C
Accuracy: ±0.01°C over full range
Dimensions: Height: front 100mm, rear 63mm, width: 168mm, depth: 215mm
Weight: 1 kg (2.2 lbs)

Resolution: 0.001°C
Stability: <0.005°C per year
Range: -200°C to +850°C, depending on PRT used
Instrument Accuracy:
F200/ F201(4 wire):<±0.01°C (±10mK)
F201 (3 wire):<±0.05°C (±50mK
Resolution: 0.001°C
Repeatability: ±2 least significant digits (±0.002°C), included in accuracy
Stability: Long term: typically <0.002W per year (<0.005°C for Pt100)
Temperature co-efficient: <0.00005°C per °C ambient change
Data entry format: ITS 90 coefficients, Callender van Dusen coefficients, or EN60751 for un-calibrated probes
Probe Current: 1 mA constant current source
Probe Types: Pt100 to EN60751 with nominal R0=100W and 25W high alpha probes up to 0.00392
Cable Length: Maximum 100 metres of 4-core 19/0.15 SPC/PTFE screened cable
Thermometer input connectors: 2 off (2 ch.) or 8 off (8 ch.) 5 pin industrial DIN socket can be used with passive or proprietary “Smart connector”
Communications: Galvanically isolated RS232C: 4KV isolation. Baud rate 9600
Operating Conditions: 0°C to 50°C, 10-90% RH non-condensing
Power Requirements: 90 to 264VAC universal IEC 320 input on rear panel, 47-63 Hz, 30VA max

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