Insulation
Resistance Testers
Product Sheet
02.11
Insulation Resistance Testers
Delivering test and measurement advantages for HVAC/R professionals worldwide
Test the TPI Advantage
Check compressor, transformer, and motor windings for insulation breakdown. TPI Insulation
Resistance Testers are ideal for preventative maintenance and performing resistance tests. All TPI
Insulation Resistance Testers include A085 UL listed silicone test lead set with screw on alligator
clips and A073 test lead set with large alligator clips. All TPI Insulation Resistance Testers are:
MARKETS
• Electrical Power
Generation
• Heavy Industry
• HVACR
• Mining
• Easy to use
• Motor Repair Shops
• Natural Gas
Transmission*
• Oil Production
• Oil Pipelines
• Railroads
• Push button or locking operation
• Automatic discharge
• Built-in battery test
ANALOG TESTERS
DIGITAL TESTERS
• Refining
• Steel
SAIT 25
SAIT 200
SDIT 30
SDIT 300
Manufacturing
*Gathering facilities,
compressor stations
and pipelines
APPLICATIONS
• Cables
• Compressors
• Controls
• Distribution
Transformers*
• Generators
Test Voltages
250V/500V/1,000V
Test Voltages
250V/500V/1,000V
Test Voltages
250V/500V/1,000V
Test Voltages
250V/500V/1,000V
• Instruments
• Motors
• Motor Windings
• Switchgear
*Medium and
high-voltage power
trans formers would
normally not be
tested with these
instruments
Insulation Resistance
100M/200M/400M
Insulation Resistance
100M/200M/400M
Insulation Resistance
2,000M/2,000M/2,000M 20M/200M/2,000M
Insulation Resistance
AC Voltage
No
AC Voltage
No
AC Voltage
No
AC Voltage
No
Continuity
2 /20
Continuity
2 /20
Continuity
200
Continuity
20/200
FEATURES
SAIT 25
Analog scale
No
SAIT 200
Analog scale
Yes
SDIT 30
Digital
No
SDIT 300
Digital
No
Display
Backlight
Battery Check
Warning Signal
Ohm Zero Adjust
Power Supply
Fuse Protected
Battery check mode
Lamp & beep
Yes
Battery (1.5V x 6)
Yes
(continuity range only) (continuity range only)
CAT III 600V CAT III 300V
Battery check mode Low battery indication
Low battery indication
Live display on the LCD & beep
Yes
Lamp & beep
Lamp & beep
Yes
Battery (1.5V x 6)
Yes
Yes
Battery (1.5V x 8)
No
The
Battery (1.5V x 8)
Yes
(continuity range only)
CAT III 600V
Value
Category
CAT II 1,000V
™
Leader
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