Overview
Configured for non-contact shaft displacement, vibration, and speed measurement, the Emerson EPRO MMG1070/02TS (MMG1070/02TS Eddy Current Displacement Sensor) detects mechanical movement on electrically conductive targets using the eddy-current principle. Integrated electronics process the measurement signal inside the transducer housing. (Profess)
Suffix Breakdown & Model Matrix
The supplied model is MMG1070/02TS. EPRO documentation identifies the corresponding MMG 1070/2 TS variant as an eddy-current displacement sensor. The documented /2 TS version is available with either 3 m or 10 m cable configurations, so the cable length should be verified from the complete order code or physical nameplate before replacement. (Profess)
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | MMG1070/02TS |
| Brand | Emerson EPRO |
| Series | MMG 1070 |
| Product Type | Eddy Current Displacement Sensor |
| Origin | Germany |
| Weight | Approx. 0.8 kg net for Type /2 TS |
| Dimensions | Dimension A: 291 mm; Dimension B: 100 mm for Type /2 TS |
| Operating Temp | 0 to +100 deg C |
| Power Consumption | Max. 15 mA at nominal supply and unloaded output; typical 8 to 12 mA |
| Measurement Principle | Contactless eddy-current measurement |
| Measurement Targets | Shaft displacement, shaft vibration, and speed |
| Measurement Range | 2.15 mm |
| Operating Frequency Range | 0 to 15 kHz at -3 dB |
| Sensitivity | 7.87 V/mm (200 mV/mil) |
| Mean Voltage | -10.00 V |
| Residual Gap | Approx. 0.5 mm |
| Nominal Power Supply | -24 VDC |
| Supply Voltage Range | -18 to -32 VDC |
| Voltage Output | Approx. -1.5 to -21.5 V at -24 V supply |
| Housing Material | Material No. 1.4541, X10CrNiTi 1810 |
| Protection Class | IP67 |
| Standard Cable | 4-core, 4 x 0.2 mm2, plus supplementary 0.5 mm2 screen conductor |
| Cable Insulation | PTFE |
| Cable Protection | PG9 cable connection |
| Intrinsic Safety | II 1G, EEx ia IIC T6, Ta < 53 deg C; T4, Ta < 60 deg C; T3, Ta < 90 deg C |
| ATEX Certificate | PTB 03 ATEX 2151 |
| Installation Interface | Threaded transducer housing; wrench opening 36 mm |
The EPRO data sheet specifies the MMG 1070 series for static and dynamic measurements. It also identifies integrated signal-processing electronics and operation in explosion-hazardous areas when the applicable intrinsic-safety configuration is used. (Profess)
Eddy-Current Measurement and TSI Signal Characteristics
The MMG1070/02TS operates as a non-contact displacement transducer. The eddy-current circuit measures changes in the electrical target condition and converts the resulting displacement into an electrical output. The specified sensitivity is 7.87 V/mm, with a nominal mean voltage of -10.00 V. (Profess)
The sensor accepts a nominal -24 VDC supply and operates over -18 to -32 VDC. At nominal supply voltage, the documented output limits are approximately -1.5 to -21.5 V. The transducer therefore requires a compatible measuring amplifier or machine monitoring input rather than a conventional 4-20 mA transmitter loop. (Profess)
The documented frequency range extends from 0 to 15 kHz at -3 dB. This bandwidth supports both static displacement measurement and dynamic shaft-motion measurement. The complete measuring chain consists of the displacement transducer and a compatible measuring amplifier or monitor, such as an MMS 6000 Machine Supervisory System monitor. (Profess)
For TSI installation, the probe gap must be established against the applicable conductive shaft target and verified using the sensor output voltage. The documented nominal mean voltage of -10.00 V provides a reference point for gap adjustment and signal validation. (Profess)
Frequently Asked Questions
Q: What power supply does the MMG1070/02TS require?
A: The transducer uses a -24 VDC nominal supply and accepts -18 to -32 VDC. Maximum consumption is 15 mA at nominal supply with an unloaded output. (Profess)
Q: What output signal does the sensor provide?
A: The sensor provides a voltage output. At -24 V supply, the documented output limits are approximately -1.5 to -21.5 V. The nominal mean voltage is -10.00 V. (Profess)
Q: Can the MMG1070/02TS operate in an explosion-hazardous area?
A: The MMG 1070 series has documented intrinsic-safety configurations with II 1G, EEx ia IIC classifications and PTB 03 ATEX 2151 certification. The complete installation must match the applicable certified configuration and system requirements. (Profess)
Field Installation Guidelines
- Mount the transducer so its sensing axis faces the electrically conductive measurement target.
- Establish the specified residual gap during mechanical installation and verify the resulting output voltage.
- Use the documented -10.00 V mean-voltage reference when checking the probe operating point. (Profess)
- Keep sensor wiring separated from high-current switching conductors and other strong electromagnetic interference sources.
- Connect the cable screen according to the installed EPRO measuring-chain grounding arrangement.
- Observe the documented cable conductor assignments: red for signal, blue for -24 V, black for 0 V, white for 0 V, and green/yellow for screen. (Profess)
- Use the appropriate PG9 cable protection arrangement where specified.
- Verify the complete cable length before replacement because the /2 TS variant is documented with both 3 m and 10 m cable configurations. (Profess)
- When installing an intrinsically safe version, maintain the required Ex installation practices and verify compatibility with the associated measuring amplifier and hazardous-area circuit.
- Connect the transducer to a compatible measuring amplifier or machine monitoring input. The MMG 1070 sensor itself does not function as a conventional 4-20 mA loop transmitter. (Profess)
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