Preciman Spare Parts: Buyer's Guide

What Does Preciman Make?

Preciman is an instrumentation and boiler-components brand whose catalog covers two clearly defined product families:

• Measurement instruments (329 SKUs): Pressure gauges in ABS and stainless-steel housings, capsule gauges for low-pressure pneumatic circuits, industrial and hot-water thermometers, and axial/radial dial variants across multiple dial diameters.
• Boiler spare parts (32 SKUs): Ignition electrodes, spark plugs, and associated combustion components designed for boiler and burner assemblies.

The breadth of the measurement range — spanning 0–60 mbar capsule gauges through to 0–400 bar high-pressure manometers — makes Preciman a single-source option for plant engineers who need instrumentation across widely varying process pressures and temperatures.

Pressure Gauge Product Lines

Preciman pressure gauges are grouped by case material, dial diameter, and mounting orientation. The table below summarises representative catalog entries available through 3G Electric.

Key selection notes: Stainless-steel-cased gauges (ROS23016, ROS20006) carry a tighter accuracy class of ±1.6% of full scale and are suited to corrosive or washdown environments. ABS-cased gauges offer ±2.5% accuracy and are the standard choice for HVAC, pneumatic, and general utility circuits. The 100 mm dial (ROS30034) with G1/2 connection is the preferred option where panel-mount readability at distance is required.

Thermometer Product Lines

Preciman thermometers cover hot-water, boiler, and industrial-process applications. Dial diameters run from 65 mm to 80 mm; stem lengths and shapes vary by installation geometry.

The axial thermometers (ROS11012, ROS12002) include a thermowell, making them suitable for hot-water lines, boilers, and hydronic heating circuits where the sensor must be removable without draining the system. The elbow-body industrial thermometer (ROS06034) suits pipework where a straight probe would conflict with adjacent equipment.

Boiler Spare Parts: Ignition Components

Preciman's 32-SKU boiler spare-parts range includes ignition electrodes and spark plugs for combustion equipment. A representative example is the Spark plug lg 389 mm 0.5 in. NPT (SKU PCM50024), whose published material properties are listed below.

When sourcing ignition electrodes or spark plugs for boiler or burner assemblies, always cross-reference the OEM part number stamped on the existing component. The physical length (389 mm in this case) and thread type (NPT vs. metric) are the two most common sources of incorrect substitution.

How to Identify the Right Preciman Part Number

Follow this procedure to select the correct SKU before placing an order:

1. Identify the product family. Determine whether you need a measurement instrument (pressure gauge or thermometer) or a boiler spare part (ignition/combustion component).
2. Record the dial or body diameter. Preciman gauges are available in 50 mm, 63 mm, and 100 mm dial sizes. Thermometers run 65 mm and 80 mm. Confirm the panel cutout or existing instrument size.
3. Note the pressure or temperature range. Match the full-scale value exactly — for example, a 0–4 bar gauge cannot be substituted with a 0–25 bar gauge on a low-pressure circuit without losing readability.
4. Check the process connection thread. Preciman gauges use G1/4 (BSP) or G1/2 (BSP) connections; ignition components may use NPT. Confirm thread standard and size from the existing fitting or equipment manual.
5. Select case material. Choose stainless steel for corrosive or wet environments; ABS for standard HVAC and pneumatic duty.
6. Confirm mounting orientation. Axial (back-entry) and radial (bottom-entry) variants carry different SKUs even at the same pressure range and dial size.
7. Submit the SKU to 3G Electric for quotation. Lead time is confirmed at the quotation stage based on current sourcing status.

Compatibility and Cross-Reference Basics

Preciman measurement instruments are designed as direct replacements in standard instrumentation circuits. When cross-referencing to replace a competitor instrument, verify:

• Process connection thread standard (BSP G-thread vs. NPT — these are not interchangeable without an adapter)
• Full-scale pressure or temperature range (must match or exceed the process maximum)
• Accuracy class (±1.6% FS for stainless-steel gauges; ±2.5% FS for ABS gauges)
• Wetted-parts material — the stainless-steel axial gauge ROS23016 uses copper-alloy wetted parts; confirm compatibility with the process fluid
• For thermometers with thermowells, confirm the thermowell insertion length matches the pipe bore

For boiler spare parts such as spark plugs, the OEM part number and physical length are the primary cross-reference criteria. Check the stamped or printed marking on the existing electrode before ordering.

Sourcing Preciman Parts Through 3G Electric

3G Electric lists 361 Preciman SKUs across the measurement and boiler spare-parts categories. All items are available to order; lead time is confirmed at quotation. To request a quote, provide the Preciman SKU (e.g., ROS27008, PCM50024) or a full description including dial size, pressure/temperature range, connection thread, and case material. For obsolete or unlisted part numbers, the 3G Electric technical team can assist with cross-referencing against current catalog equivalents.

Frequently Asked Questions

What product categories does Preciman cover?

Preciman produces measurement instruments (329 SKUs) — primarily pressure gauges and thermometers — and boiler spare parts (32 SKUs) including ignition electrodes and spark plugs. The full 361-SKU range is available to order through 3G Electric.

What is the difference between ABS and stainless-steel Preciman pressure gauges?

Stainless-steel gauges (e.g., ROS23016, ROS20006) offer ±1.6% full-scale accuracy and suit corrosive or washdown environments. ABS-cased gauges offer ±2.5% accuracy and are standard for HVAC, pneumatic, and general utility circuits. Choose based on environment and required accuracy class.

How do I identify the correct Preciman pressure gauge SKU?

Match four parameters: dial diameter (50 mm, 63 mm, or 100 mm), full-scale pressure range, process connection thread (G1/4 or G1/2 BSP), and mounting orientation (axial or radial). Each combination has a unique SKU — confirm all four before ordering.

Can I use a G1/4 BSP Preciman gauge on an NPT-threaded port?

No — BSP G-thread and NPT are not directly interchangeable. A thread adapter is required. Confirm the thread standard on the existing port before ordering to avoid installation delays.

What specs should I check when ordering Preciman spark plug PCM50024?

Verify the physical length (389 mm), thread type (0.5 in. NPT), and operating temperature range (-55 to +220 °C). The dielectric strength is 18 kV/mm. Cross-reference the OEM part number stamped on the existing component to confirm a direct match.

Are Preciman thermometers with thermowells removable under pressure?

Thermowells allow the thermometer stem to be withdrawn without draining the system, making them suitable for boilers and hot-water circuits. Confirm the thermowell insertion length matches your pipe bore — stem lengths in the catalog range from 50 mm to 100 mm.

How long does it take to receive Preciman parts ordered through 3G Electric?

Lead time is confirmed at the quotation stage and depends on current sourcing status. No standing stock claim is made. Submit the SKU or full part description to receive a firm delivery estimate before committing to an order.

What information do I need to request a Preciman quote from 3G Electric?

Provide the Preciman SKU if known (e.g., ROS23016, PCM50024). If the SKU is unknown, supply: product type, dial or body size, pressure or temperature range, connection thread standard and size, case material preference, and mounting orientation. This allows accurate cross-referencing.