Description
⚙️ GEISLINGER GMS-MARK4 is a fourth-generation Geislinger Monitoring System designed for continuous monitoring of torsional vibration in marine and other powertrain applications. The system measures torsional vibration amplitudes, provides alarm indications when configured limits are reached, and also displays engine speed and operating hours.
The GMS Mark4 is built around three main components: digital sensors, a junction box, and a system unit. It can monitor parameters such as free-end torsional vibration, filtered vibration orders, and damper twist, making it suitable for condition monitoring of crankshafts, shafts, dampers, and couplings.

GMS-MARK4
📋 Product Datasheet
| Parameter | Specification |
|---|---|
| Brand | GEISLINGER |
| Model | GMS-MARK4 |
| Series | Geislinger Monitoring System |
| Product Name | Torsional Vibration Monitoring System |
| Generation | Mark4 / 4th Generation |
| Primary Application | Marine Engine & Powertrain Monitoring |
| Main Measurement | Torsional Vibration Amplitude |
| System Components | Digital Sensors + Junction Box + System Unit |
| Power Supply | 24 VDC ±20% |
| Maximum Current Consumption | 1 A |
| Relay Outputs | 4 × Relay Outputs, max. 24 VDC / 1 A |
| Analog Output | 1 × 4–20 mA |
| Serial Communication | RS232 |
| Operating Temperature | System Unit: up to 55°C; Junction Box: up to 70°C; Sensors: up to 100°C |
| Dimensions | Refer to installation-specific documentation |
| Weight | Installation-dependent |
| Condition | Used — verify actual item condition |
🔧 Key Features
- ⚙️ Continuous torsional-vibration monitoring
- 📊 Measurement of vibration amplitude at the free end of the crankshaft
- 🔍 Filtered monitoring of selected vibration orders
- 🔄 Damper twist monitoring
- 🚨 Warning and alarm output functions
- 🔌 Four relay outputs for connection to a remote ship control system
- 📈 4–20 mA analog output for remote indication
- 💻 RS232 serial interface for PC measurement and data recording
- 🕒 Engine-speed and operating-hour indication
- ⚓ Designed for marine propulsion and powertrain applications
The GMS Mark4 manual describes standard monitoring functions including Free End Total, Free End Filtered, and Damper Twist.
🔗 System Integration
The GMS-MARK4 can operate as part of a marine engine condition-monitoring architecture. Digital sensors collect torsional-vibration information from the monitored drivetrain and transmit the signals through the junction box to the system unit, where measurements are processed and displayed.
The system unit provides four relay outputs for warning, alarm, spare functions, and GMS system failure. A 4–20 mA output can transmit a measured value for remote indication, while the RS232 interface can be used for PC-based measurement recording and system setup.
For replacement applications, verify the system-unit type, works number, programmed monitoring configuration, sensor arrangement, junction-box wiring, and installation-specific settings before commissioning. Geislinger also confirms that its newer analytics platform can accept manually uploaded data from previous GMS generations including GMS Mk4.
❓ FAQ
Q1: What is GEISLINGER GMS-MARK4?
A: It is a Geislinger fourth-generation monitoring system designed primarily for continuous torsional-vibration monitoring of powertrains.
Q2: What does the GMS Mark4 monitor?
A: Standard applications include free-end torsional vibration, filtered vibration orders, and damper twist.
Q3: What power supply does the system require?
A: The documented system unit uses 24 VDC ±20%, with maximum current consumption of 1 A.
Q4: Does it have alarm outputs?
A: Yes. The system has four relay outputs, with standard functions including warning, alarm, spare, and GMS system-failure indication.
Q5: Does GMS-MARK4 support remote indication?
A: Yes. It provides a 4–20 mA analog output for remote indication of measured values.
Q6: Can it communicate with a PC?
A: Yes. The system provides an RS232 serial communication interface for measurement recording and related configuration functions.
🔑 Product Keywords
GEISLINGER GMS-MARK4, GMS-MARK4, Geislinger Monitoring System, Geislinger GMS Mark4, Torsional Vibration Monitoring, Marine Engine Monitoring, Marine Powertrain Monitoring, Geislinger Damper Monitoring, Torsional Vibration Sensor System, Marine Condition Monitoring, Geislinger System Unit
For additional marine automation, engine monitoring, and industrial control products: New PLC DCS
🔟 Other Geislinger Models / Related Systems
- Geislinger GMS-Mk5 – Monitoring System
- Geislinger GMS-Mk6 – Monitoring System
- Geislinger Analytics Platform – GAP
- Geislinger GMS Digital Sensor
- Geislinger GMS Junction Box
- Geislinger GMS System Unit
- Geislinger DAMPER Monitoring System
- Geislinger Coupling Monitoring System
- Geislinger Flexlink Monitoring Components
- Geislinger Condition-Based Monitoring System
For replacement applications, match the complete GMS system configuration, sensor arrangement, junction box, system-unit type, and programmed monitoring functions before installation.
