A portable modular unit for inspecting in a timepiece the presence of a lubricating agent, or of an epilame, having fluorescent markers, from an excitation luminous flux of white light. The modular unit includes an optical housing, forming a first module, a portable white light source (200) emitting an excitation luminous flux, forming a second module, a portable magnifying device, forming a third module. The optical housing includes a first mounting interface for removably mounting the portable white light source on the optical housing, the first mounting interface being configured so that the excitation luminous flux emitted by the portable white light source is directed in the direction of the excitation filter; and a second mounting interface for removably mounting the portable magnifying device on the optical housing, the second mounting interface being configured so that the magnifying device is opposite the inspection opening.

A portable modular unit for inspecting in a timepiece the presence of a lubricating agent, or of an epilame, having fluorescent markers, from an excitation luminous flux of white light. The modular unit includes an optical housing, forming a first module, a portable white light source (200) emitting an excitation luminous flux, forming a second module, a portable magnifying device, forming a third module. The optical housing includes a first mounting interface for removably mounting the portable white light source on the optical housing, the first mounting interface being configured so that the excitation luminous flux emitted by the portable white light source is directed in the direction of the excitation filter; and a second mounting interface for removably mounting the portable magnifying device on the optical housing, the second mounting interface being configured so that the magnifying device is opposite the inspection opening.

Provided is an oil deterioration diagnosis device capable of detecting oil deterioration accurately and early in real time during operation of an operating machine without oil sampling. An oil deterioration diagnosis device 10 for a construction machine including an oil hydraulic circuit 1 includes: a floodlight projector 11a configured to irradiate oil flowing through the oil hydraulic circuit 1 with measuring light having a predetermined wave number or wavelength during operation of the construction machine; a photoreceiver 11b configured to receive transmitted light having penetrated the oil; a signal processing unit 11c configured to continuously or intermittently measure absorbance or transmittance; and a diagnosis unit 12 configured to detect a decrease of an antioxidant contained in the oil or an increase of a peroxide contained in the oil, based on changes in the absorbance or the transmittance.

A system for monitoring a piece of hydraulic fracturing equipment such as a positive displacement pump. The system includes a plurality of sensors configured to detect conditions of the hydraulic fracturing pump and a processor that is communicatively coupled to the plurality of sensors and configured to analyze data received from the plurality of sensors. The processor is also configured to predict faults in the hydraulic fracturing pump based on the data analysis. The system also includes a communication interface that is configured for transmitting predicted fault data to one or more devices.

This installation (2) for following up the evolution of the basicity of a lubricant circulating in a piece of equipment (M) comprises at least one conduit (4) for circulating (F1) the lubricant, this conduit being connected, upstream, to the piece of equipment (M) and the, downstream, to a recovery pan (6) as well as at least one sensor (48) for determining the basicity index of the lubricant. The installation further comprises a first controlled valve (20) for interrupting the circulation (F1) of the lubricant in the conduit (4), a buffer tank (26) for accumulating the lubricant, a first bypass line (28) connected to the conduit (4), upstream from the first valve (20) on the one hand and to the buffer tank (26) on the other hand. The installation also comprises a second controlled valve (32) for interrupting the circulation of the lubricant in the first bypass line (28), a second line (42) for discharging the lubricant, from the buffer tank (26) to the recovery pan (6) and a third controlled valve (44) for interrupting the circulation of the lubricant in the second discharge line (42). The sensor (48) is positioned on the second discharge line (42) and allows determination of the basicity index of the lubricant at the outlet of the buffer tank (26).

This installation (2) for following up the evolution of the basicity of a lubricant circulating in a piece of equipment (M) comprises at least one conduit (4) for circulating (F1) the lubricant, this conduit being connected, upstream, to the piece of equipment (M) and the, downstream, to a recovery pan (6) as well as at least one sensor (48) for determining the basicity index of the lubricant. The installation further comprises a first controlled valve (20) for interrupting the circulation (F1) of the lubricant in the conduit (4), a buffer tank (26) for accumulating the lubricant, a first bypass line (28) connected to the conduit (4), upstream from the first valve (20) on the one hand and to the buffer tank (26) on the other hand. The installation also comprises a second controlled valve (32) for interrupting the circulation of the lubricant in the first bypass line (28), a second line (42) for discharging the lubricant, from the buffer tank (26) to the recovery pan (6) and a third controlled valve (44) for interrupting the circulation of the lubricant in the second discharge line (42). The sensor (48) is positioned on the second discharge line (42) and allows determination of the basicity index of the lubricant at the outlet of the buffer tank (26).

A lubricity tester unit may comprise a housing, a shaft, wherein a first end of the shaft is disposed at a first end of the housing, wherein the shaft extends through housing along a central axis of the housing, and an encoder, wherein the encoder is disposed on an internal wall of the housing, wherein the shaft is disposed through a hole in the encoder, wherein the encoder is an optical encoder configured to measure angular position of the shaft. The lubricity tester unit may further comprise rotating rings, wherein the rotating rings are coupled to a second end of the shaft, a friction inducing surface, wherein the friction inducing surface is disposed around the rotating rings, a first sensor, wherein the first sensor is disposed through the housing, and a second sensor, wherein the second sensor is disposed through the housing.

A lubricity tester unit may comprise a housing, a shaft, wherein a first end of the shaft is disposed at a first end of the housing, wherein the shaft extends through housing along a central axis of the housing, and an encoder, wherein the encoder is disposed on an internal wall of the housing, wherein the shaft is disposed through a hole in the encoder, wherein the encoder is an optical encoder configured to measure angular position of the shaft. The lubricity tester unit may further comprise rotating rings, wherein the rotating rings are coupled to a second end of the shaft, a friction inducing surface, wherein the friction inducing surface is disposed around the rotating rings, a first sensor, wherein the first sensor is disposed through the housing, and a second sensor, wherein the second sensor is disposed through the housing.

A method for utilizing a lubricating oil composition in which the content of a metal-based cleaning agent (X) having a base value of 100 mgKOH/g or less is 630 mass ppm or less in terms of metal atoms, and the content of sulfated ash is 1.5 mass % or less. The method includes measuring at least one physical property value among the capacitance and the dielectric constant of the lubricating oil composition while using the lubricating oil composition, and evaluating the progress of degradation of the lubricating oil composition.

A method for utilizing a lubricating oil composition in which the content of a metal-based cleaning agent (X) having a base value of 100 mgKOH/g or less is 630 mass ppm or less in terms of metal atoms, and the content of sulfated ash is 1.5 mass % or less. The method includes measuring at least one physical property value among the capacitance and the dielectric constant of the lubricating oil composition while using the lubricating oil composition, and evaluating the progress of degradation of the lubricating oil composition.