Preferred Instruments

Preferred Instruments delivers precision measurement and control solutions for boilers, burners, and HVAC systems since 1920. Their product line includes flow meters, pressure gauges, CO₂ analyzers, and advanced control systems that help operators monitor performance and reduce energy costs. Trust Jackson Systems for competitive pricing on Preferred Instruments’ proven technology that keeps your equipment running efficiently.

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Type J Thermocouple Assembly for Accurate Temperature Sensing

Preferred Instruments

SKU: 104087D
$252.85
MSRP: $290.78
You save 15%
Preferred Instruments 104087D Type J Thermocouple Assembly quantity
UV/Flame Rod Input Select Purge/TFI Control Module

Preferred Instruments

SKU: 5004-795-0000
$1,609.50
MSRP: $1,850.93
You save 15%
Preferred Instruments 5004-795-0000 UV/Flame Rod Input Select Purge/TFI quantity
Wiring Base Compatible with Models 5004-890 & 5004-795

Preferred Instruments

SKU: 5004-270
$256.48
MSRP: $294.95
You save 15%
Preferred Instruments 5004-270 Wiring Base for Models 5004-890 & 5004-795 quantity
UV/Flame Rod Output Module, 120VAC Input

Preferred Instruments

SKU: 500201120000
$3,082.16
MSRP: $3,544.48
You save 13%
Preferred Instruments 500201120000 UV/Flame Rod Output Module, 120VAC Input quantity