4-Channel Digital EGT and/or CHT Pyrometer Gauge Display

The MPG-4C monitors four thermocouple channels simultaneously on a single 2-1/4" color LCD gauge. Each channel can be independently configured for EGT or CHT, assigned its own alarm setpoint, and labeled to match the specific sensor installed.

Five user-selectable display screen layouts control how the four readings are organized and presented. The gauge accepts Type K, J, and E thermocouples, fits a 57mm round panel cutout, and operates on 8–30 VDC.

Probes are not included — the MPG-4C is a gauge-only SKU, sold separately from TSC’s EGT and CHT sensor lineup.

Why 4 Channels Changes What You Can See

The step up from a 2-channel to a 4-channel instrument is not simply about adding more probes—it changes what diagnostic questions you can answer in a single glance.

A 2-channel gauge tells you whether a measured pair of cylinders is in balance and within range. A 4-channel gauge across a 4-cylinder engine shows the thermal distribution across the entire combustion event—identifying which cylinder is leading, which is lagging, and whether any outlier is developing in isolation.

That whole-engine picture is the primary reason to choose the MPG-4C over multiple 2-channel gauges.

Color LCD vs. LED Digit Displays: The Core Design Difference

The DPG-SD and DPG-XR gauges use LED digit displays—bright, high-contrast numeric readouts that are easy to read in direct sunlight and visible at a glance from across a cockpit.

The MPG-4C and MPG-12C use graphic color LCD displays with backlighting. Understanding the tradeoffs between these display technologies helps confirm whether the MPG-4C is the right choice for a specific installation.

Five Display Screen Layouts

The MPG-4C stores five user-configurable display layouts selectable via front panel controls.

All-Channel Simultaneous View

The primary operating screen shows all four channels simultaneously. Each channel is labeled and visible at once, allowing quick comparison across all sensors. When an alarm triggers, the affected channel changes to red for immediate identification.

Paired Channel Views

Two channels are displayed prominently, with secondary channels still visible. Useful when two measurements are of primary interest.

Single-Channel Focus View

Displays one channel at full size for maximum readability. Useful for focused diagnostics.

Peak Hold Recall View

Displays maximum recorded temperatures for all channels. Peak data is stored in non-volatile memory and retained after power cycles.

Per-Channel Configuration

EGT / CHT Labeling

Each channel is independently labeled to match the installed sensor type, ensuring clarity during operation.

Independent Alarm Setpoints

Each channel has its own programmable high-temperature alarm threshold.

Thermocouple Type Selection

Supports Type K, J, and E thermocouples, with independent configuration per channel

Alarm Output: Open-Collector vs Relay

The MPG-4C uses an open-collector NPN transistor output.

When the alarm triggers:

• The output switches to ground (pulls the signal low) 

Key characteristics:

• Maximum current: 0.25A DC 
• Requires external power for connected devices 

This output is ideal for:

• Logic-level inputs 
• External relays (with proper interface) 
• Indicator lights or buzzers 

It is not intended to directly drive high-current loads.

Accuracy

• ±5°F (±2.8°C) typical across the full range 

This absolute accuracy can be tighter than proportional full-scale specifications within the typical EGT operating range. For most applications, relative temperature differences between channels are the most important diagnostic factor.

Panel Mounting

• 57mm (2-1/4") round cutout 
• Supports front or rear mounting configurations 

This differs from the 52mm cutout used by DPG-series gauges and should be confirmed before installation.

Power and Wiring

Power Supply

• 8–30 VDC input 
• Current draw varies with backlight level 

Thermocouple Inputs

Each channel requires a dedicated thermocouple pair.

Type K polarity:

• Yellow = Positive (+) 
• Red = Negative (–) 

Correct polarity must be maintained for accurate readings.

Applications

4-Cylinder Engines

Provides full-cylinder EGT monitoring in a single gauge.

Mixed EGT and CHT Installations

Supports combined sensor types with clear labeling and independent alarms.

Turbocharged Engines

Suitable for monitoring pre-turbo EGT or combined EGT/CHT setups.

V8 Engines

Covers selected cylinders or one bank. For full coverage, use MPG-12C.

Technical Specifications

TSC Pyrometer Gauge Family Comparison

Summary

The MPG-4C provides a compact, multi-channel temperature monitoring solution with structured display layouts and independent channel configuration.

• Simultaneous 4-channel monitoring 
• Per-channel labeling and alarms 
• Flexible display configurations 
• Compatible with multiple thermocouple types 

It is well suited for applications where understanding temperature distribution across multiple points is critical to performance and diagnostics.