Emerson PR9268 Electric Speed Sensor

Basic and Product Positioning

（1） Basic Information

Product type: Electrodynamic Velocity Sensor

Core application: Absolute measurement of casing vibration for key rotating machinery such as steam turbines, gas turbines, water turbines, compressors, pumps, fans, etc

Core feature: Self powered design, no need for external power supply, direct output of vibration speed signal

（2） Model classification and installation direction

Model Series Measurement Direction Installation Angle Limitation Core Features

PR9268/01x-x00 Omni Directional Universal, with the lightest weight (280g)

PR9268/20x-x00 vertical no perfusion current ± 30 °; Conventional temperature type with injection current ± 60 ° C, protection IP55

PR9268/30x-x00 horizontal no irrigation/irrigation current ± 10 °/± 30 ° conventional temperature type, protection IP55

PR9268/60x-000 Vertical (HT High Temperature) – High Temperature Adaptation (-20~200 ℃), IP65 Protection

PR9268/70x-000 Level (HT High Temperature) – High Temperature Adaptation (-20~200 ℃), IP65 Protection

Core technical parameters

（1） Dynamic performance parameters (by model)

Performance indicators PR9268/01x-x00 PR9268/20x-x00/30x-x00 PR9268/60x-000/70x-000

Sensitivity 17.5 mV/mm/s 28.5 mV/mm/s (723.9 mV/in/s) 22.0 mV/mm/s (Pin3100 Ω load); 16.7 mV/mm/s (Pin1/4, 50/20 Ω load) ± 5%

Frequency range 14~1000Hz 4~1000Hz 10~1000Hz

Natural frequency 14Hz ± 7% (20 ℃) 4.5Hz ± 0.75Hz (20 ℃) 8Hz ± 1.5Hz (20 ℃)

Lateral sensitivity<0.1 (80Hz) 0.13 (20x, 110Hz); 0.27（30x，110Hz） 0.10（80Hz）

Vibration amplitude (mechanical limit) 500 µ m peak to peak 3000 µ m peak to peak (4000 µ m) 3000 µ m peak to peak (4000 µ m)

Amplitude linearity<2%<2%<2%<2%

Maximum continuous acceleration of 10g (98.1m/s ²); Intermittent 20g (196.2m/s ²), continuous 10g (98.1m/s ²); Intermittent 20g (196.2m/s ²), continuous 10g (98.1m/s ²); Intermittent 20g (196.2m/s ²)

Maximum lateral acceleration 2g (19.62m/s ²) 2g (19.62m/s ²) 2g (19.62m/s ²)

Damping coefficient~0.6% (20 ℃)~0.56% (20 ℃); ~0.42（100℃） ~0.7（20℃）； ~0.5（200℃）

Resistance 1723 Ω± 2% 1875 Ω± 10% 3270 Ω± 10% (Pin3); 3770Ω±10%（Pin1）

Inductance ≤ 90mH ≤ 90mH ≤ 160mH

Active capacitance<1.2nF<1.2nF can be ignored

（2） Environment and General Parameters

Parameter category specific specifications

Power supply method: Self Powered

Normal working temperature range (01x/20x/30x): -20~100 ℃ (-4~212 ° F); High temperature type (60x/70x): -20~200 ℃ (-4~392 ° F)

Protection level 20x/30x series: IP55; 01x/60x/70x series: IP65

Relative humidity 0~100%, no condensation

Material 20x/30x series: Al Mg Si Pb F 28 aluminum alloy; 01x/60x/70x series: stainless steel

Cable PTFE material, 3-core x 0.5mm ²

Armor made of stainless steel material

Harting connector plug (die cast aluminum alloy)

Weight (without cable) 01x series: 280g; 20x/30x series: 930g; 60x/70x series: 1050g

Certification and Hazardous Area Approval

（1） Compliance certification

Certification Type Compliance Standards

CE 2014/30/EU（EN 61326-1）、2014/34/EU、2011/65/EU（EN 63000）

ATEX EN IEC 60079-0:2018、EN IEC 60079-11:2023

IECEx IEC 60079-0:2017、IEC 60079-11:2011

CSA CAN/CSA-C22.2 NO. 61010-1-12、UL 61010-1

UKCA S.I. 2016 No. 1091、S.I. 2016 No. 1107、S.I. 2012 No. 3032

（2） Approval for hazardous areas

Model series Explosion proof type ATEX certification IECEx certification Environmental temperature range

20x/30x/20x-100-OPR/30x-100-OPR Intrinsic Safety (ia) II 1G Ex ia IIC T6 Ga; II 1G Ex ia IIC T4 Ga Ex ia IIC T6 Ga； Ex ia IIC T4 Ga T6：-20~68℃； T4：-20~108℃

60x-000/70x-000 Intrinsic Safety (ib) II 2G Ex ib IIC T4 Gb; II 2G Ex ib IIC T3 Gb Ex ib IIC T4 Gb； Ex ib IIC T3 Gb T4：-20~125℃； T3: -20~190 ℃ (connector -40~100 ℃)

Ordering Information and Accessories

（1） Ordering model coding rules

Model segment optional parameter description

PR9268 01/20/30/60/70 Measurement direction (omnidirectional/vertical/horizontal/vertical HT/horizontal HT)

Cable lengths of 0 (3m armored), 1 (5m armored), 2 (8m armored), 3 (10m armored), 4 (3m unarmored), 5 (5m unarmored), 6 (8m unarmored), 7 (10m unarmored), and 8 (no cable) are only applicable to omnidirectional types

Cable terminals 0 (Harting plug), 1 (open type), and 9 (C-5015 plug) are not suitable for HT models; C-5015 plug is only suitable for cable free models

（2） Special versions and accessories

Type and Model Description

Special version PR9268/20x-100-OPR/30x-100-OPR FEP coated stainless steel armored sensor

Special version PR9268/61x-100-CNSPEC/71x-100-CNSPEC open cable end, requiring separate installation of resistor network

Accessory AC100 expansion cable, compatible with PR9268/018-900 model (see separate specification table for details)