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Explosion-Proof Inclinometer

Vigor Technology MEMS Inclinometer / Explosion-Proof Inclinometer


  • Real high accuracy & long-term stability 
  • Armored cable, Anti-pull, wear & corrosion resistance and so on 
  • Compliance with standards of CENELEC, IEC and NEC 
  • EXdIICT6 explosion-proof , IP66 protection 
  • Aluminum alloy housing, Low cost 


Level measurement in harsh environment (petroleum, chemical industry, natural gas, flammable and explosive), precision angle measurement, and industry & lab equipment leveling. 
Attitude monitoring, angle measurement and alarming of the building and structures in gas explosion-proof zone 1 & 2 and dust explosion-proof zone 21 & 22. 
Attitude monitoring in harsh environment, such as offshore drilling platform, large-inflammable and explosive storage, complex geology, dangerous vehicles and vessels. Also applied for monitoring the detection equipment in the dangerous area.

Explosion-Proof Inclinometer
Inclinometer specifications
Measurement range ±5° ±10° ±15° ±30° ±45° ±60°
Combined absolute
accuracy ①(@25 ℃ )
±0.01° ±0.015° ±0.02° ±0.04° ±0.06° ±0.08°

Absolute linearity(LSF,%FS)

±0.06 ±0.03 ±0.03 ±0.03 ±0.02 ±0.02

Cross-axis sensitivity②

Offset ③ ±0.005° ±0.008°
Repeatability ±0.0025°
Hysteresis ±0.0025°
Allowed installation misalignment④ ±4.0° ±3.0° ±2.5° ±1.5° ±1.2° ±1.2°
Input-axis misalignment ≤±0.1°
Sensitivity temperature drift
≤100ppm/℃ ≤50ppm/℃
Offset temperature drift
≤0.003°/ ℃
Offset turn on repeatability⑤ ±0.008°
Resolution 0.0025°
Long-term stability(1 year)⑥ ≤0.02°
Measurement axis Single & Dual axis
Output 4~20mA, 0~5VDC, -5~+5VDC
Cold start warming time 60s
Response time⑦ 0.3s(@t90)
Refresh rate 5Hz, 10Hz, 20Hz
Response frequency⑧ 3Hz @-3dB
Power supply 9~36VDC
Power consumption Average working current≤ 50mA, average power≤ 1.5W(25℃&24VDC)
Operation temperature range -40~55℃
Storage temperature range -60~100℃
EMC EN 61000
Explosion-proof LCIE 11 ATEX 3005
IECEx CQM 11.0022X
Insulation resistance 100MΩ
MTBF ≥25000 h/times
Shock 100g@11ms, three-axis, half-sine
Vibration 8grms, 20~2000Hz
Protection IP65(Optional IP66)
Connecting Explosion proof connector(meet ATEX)
Cable Armored cable(meet ATEX), standard length 2m, Customized
Weight 0.9Kg(without cable or connector)

① Combined absolute accuracy means the compositive value of sensor's absolute linearity, repeatability, hysteresis, offset and cross-axis sensitivity error.(in room temperature condition) as
②The cross-axis sensitivity means the angle that the tilt sensor may be banked to the normal tilt direction of sensor. The cross-axis sensitivity (± 0.1%FS)shows how much perpendicular acceleration or inclination is coupled to the inclinometer output signal. For example, for the single-axis inclinometer withrange ±30°(assuming the X-axis as measured tilt direction), when there is a 10° tilt angle perpendicular to the X-axis direction(the actual measuring angle is no change, example as +8.505°), the output signal will generate additional error for this 10° tilt angle, this error is called as cross-axis sensitivity error.SST300`s cross-axis sensitivity is 0.1%FS, the extra error is 0.1%×30°=0.03°(max), then real output angle should be +(8.505°±0.03°). In SST300 series,this error has been combined into the absolute accuracy
③ Offset means that when no angle input (such as the inclinometer is placed on an absolute level platform), output of sensor is not equal to zero,the actualoutput value is zero offset value.
④ Allowed installation misalignment means during the installation, the allowable installation angle deviation between actual tilt direction and sensor's nature measure ment direction. In general, when installed,SST300 sensor is required that the measured tilt direction keep parallel or coincident with sensor designated edge, this parameter can be allowed a certain deviation when sensor is installed and does not affect the measurement accuracy.
⑤ Offset turn on repeatability means the repeatability of the sensor in repeated by supply power on-off-on many times.
⑥ Long-term stability means the deviation between the statistics of the maximum and the minimum output value after a year of continuous power supply when the sensor is at 20℃ .
⑦ The response time refers to the angle sensor in a step change (such as the angle changes from -10 ° to +10 °within 5ms), the time required that output of the sensor achieved to the standard value of 90%. The index is different from the sensor set-up time
⑧ Response frequency is for the limitation of the dynamic measurement range, when the dynamic measurement exceeds 3 Hz, because of centripetal force, the output occupied additional random error,this error is difficult to define