Updated May 30, 2026 A furnace thermocouple problem is almost always one of three things: the sensor itself, the compensating cable or its polarity, or the cold junction. You can pin down which one in … Continue reading →

Updated May 28, 2026 · Sino-Inst Engineering Team A magnetostrictive level gauge will deliver ±0.5 mm accuracy and resolve interface layers when four conditions are met: the float specific gravity matches the medium, the probe … Continue reading →

Updated May 28, 2026 · Sino-Inst Engineering Team A residential water meter looks simple from the outside — a brass body, a glass face, a few rolling digits. Inside, it is doing one of three … Continue reading →

Updated May 28, 2026 · Sino-Inst Engineering Team There is no universal “best” radar level gauge. The selection collapses to four questions: what is the medium, how much beam clearance does the tank give, is … Continue reading →

Updated May 27, 2026 | Sino-Inst Engineering Team A tank level monitoring system is not a single sensor — it is three layers: the level sensor, the 4–20 mA or HART signal, and the recorder … Continue reading →

Updated May 27, 2026 | Sino-Inst Engineering Team For pressure transducer wetted parts, the choice between 316L and 17-4PH stainless steel is the single most important spec you put on the RFQ. 316L is the … Continue reading →

Updated May 27, 2026 | Sino-Inst Engineering Team Hydrostatic pressure is the pressure a liquid exerts on a point below its surface, equal to density × gravity × depth. In SI units, P = ρgh … Continue reading →

Updated May 26, 2026 | Sino-Inst Engineering Team A submersible pressure transducer measures the hydrostatic head of liquid above its diaphragm and reports it as a 4–20 mA, 0–5 V, or RS485 signal. Choosing one … Continue reading →

Updated May 26, 2026 | Sino-Inst Engineering Team Choosing an ammonia flow meter starts with one question: is the NH3 liquid, gas, or switching between both? Each phase demands a different meter technology. Anhydrous liquid … Continue reading →

Updated May 26, 2026 | Sino-Inst Engineering Team Most pressure transmitter troubleshooting calls trace to one of five things. A 4–20 mA transmitter with “no output” looks like a dead sensor, but it almost never … Continue reading →

Contents Why Velocity Profile Decides the Required Straight Run Straight Length by Flow Meter Type ISO 5167 Lengths for Differential Pressure Elements Upstream Disturbance Multipliers Flow Conditioners as a Compensation Strategy Measuring Straight Length the … Continue reading →

Contents Why Geometry Decides Accuracy Blanking Distance: Sizing the Dead Zone Five-Step Mounting Procedure Beam Angle and Clearance Math Avoiding False Echoes from Internals and Foam Outdoor Installation: Sun, Wind, Rain Commissioning: 6 Calibration Steps … Continue reading →

Contents What a Venturi Tube Does The Venturi Effect and Bernoulli Equation Anatomy of a Classical Venturi Tube Five Venturi Tube Designs by Geometry Worked Flow Calculation: From ΔP to Q Venturi vs Orifice Plate … Continue reading →

The K-factor of a flow meter is the number of output pulses the meter generates per unit volume of fluid. It is the calibration constant that lets a turbine, vortex, or paddle-wheel meter convert its … Continue reading →

Static, dynamic, and total pressure are three flavours of the same scalar — but they appear at different ports of a Pitot-static probe, drive different process instruments, and trip up new HVAC and fluid-mechanics engineers … Continue reading →

GPM and LPM are the two flow-rate units printed on almost every industrial pump, valve, and flow meter datasheet. GPM means gallons per minute (US gallons unless the label says otherwise). LPM means litres per … Continue reading →

Sulfuric acid storage tanks combine three measurement obstacles: corrosive vapor in the headspace, concentration-dependent material compatibility, and regulated overfill protection. Direct-contact float and capacitance probes corrode within months. Non-contact 80 GHz radar with the right … Continue reading →

Blast furnace stockline measurement runs at 1200 °C inside, with dust, hydrogen-rich gas, and constant charging dynamics. Mechanical sounding rods and isotope sources have given way to 80 GHz FMCW radar as the standard since … Continue reading →

A 4-20 mA current loop carries a sensor signal across hundreds of meters with near-zero drift. A 0-10 V PLC card cannot accept that current directly. Converting between the two is a five-cent fix on … Continue reading →

Updated May 21, 2026 — Yes, most flow meters can run on a vertical pipe — but only if you pick the right type and respect the orientation rules. A magnetic meter mounted with horizontal … Continue reading →

Updated May 21, 2026 — A condensate flow meter sits on the return side of a steam loop and measures the hot, sub-cooled water flowing back to the boiler feed tank. Pick the wrong technology … Continue reading →

Updated May 21, 2026 — A pressure transmitter is only as accurate as its installation. Mount it on the wrong elevation, route impulse tubing without a proper slope, or skip the root valve and you … Continue reading →

A water tank level sensor is the small instrument that turns “how much water is left” into a number a pump controller, PLC, or phone app can read. The right choice depends on tank material, … Continue reading →

A pressure transmitter drifts. Diaphragm fatigue, temperature swings, vibration, and process buildup move the zero and span over time. A 0.1 % drift on a 0–1.6 MPa range puts the loop 1.6 kPa off — enough to trip … Continue reading →

Pressure is force per unit area, but the unit you put on a gauge depends on the industry, the country, and the instrument. A process plant in Asia reads MPa, an HVAC tech reads inches … Continue reading →

An ultrasonic CO2 level indicator is a portable handheld tool that confirms how full a CO2 cylinder is without removing it from service. A technician presses the probe against the outside of the cylinder, runs … Continue reading →

A Karman vortex air flow sensor measures the frequency of vortices shed behind a bluff body in a moving air stream. Frequency is proportional to flow velocity, so counting vortices gives a direct, moving-parts-free reading … Continue reading →

The wetted parts of a pressure sensor are the surfaces that the process media actually touches — diaphragm, port, fill fluid (if any), and any seals or gaskets exposed to the line. Pick the wrong … Continue reading →

A chilled water flow meter measures the flow rate of cooling fluid in an HVAC plant, district cooling loop, or industrial process chiller. The right meter type depends on pipe size, accuracy class, glycol content, … Continue reading →

An underground tank level indicator measures the liquid depth inside a buried tank — fuel, potable water, septic, or chemical — and shows it on a gauge, panel, or remote dashboard. The right indicator depends … Continue reading →

A differential pressure transmitter (DPT) measures the pressure drop across two points — across an orifice for flow, across a liquid column for level, or between two process taps for filter monitoring. Installation decides whether … Continue reading →

Flow rate and pressure are linked by Bernoulli’s equation, by friction losses, and by the geometry of whatever the fluid passes through. A pump that delivers 200 kPa across a 50 mm pipe will not push … Continue reading →

A pressure transmitter converts process pressure into a 4-20 mA, HART, or digital signal that a control system can read. Inside the housing, a sensing element deflects under pressure; the deflection is measured as a change … Continue reading →

SCADA stands for Supervisory Control And Data Acquisition. It is the software-and-hardware stack that lets one operator watch — and steer — dozens or hundreds of field instruments from a single screen. SCADA does not … Continue reading →

Updated Apr 25, 2026 — Reviewed by Sino-Inst Engineering Team A BTU meter for chilled water quantifies cooling energy by combining a flow meter with a matched pair of RTDs on the supply and return. … Continue reading →

A stilling well is a metal pipe installed inside a tank with calibrated holes near the bottom. It surrounds the radar antenna (or any non-contact level transmitter) and dampens the surface chaos — foam, turbulence, … Continue reading →

Most flow meter accuracy problems trace back to one root cause: not enough straight pipe before and after the meter. Get the upstream and downstream lengths right and a $3,000 magmeter holds its ±0.5% spec. … Continue reading →

A PID controller takes the difference between where a process is and where you want it to be (the error), then computes a corrective output using three weighted terms — proportional, integral, and derivative — … Continue reading →

An RTD (resistance temperature detector) measures temperature by tracking how the resistance of a platinum element rises with temperature. A thermocouple measures temperature by reading the millivolt signal produced when two dissimilar metal wires join … Continue reading →

A magnetic flow meter (magmeter) measures conductive liquid by Faraday’s law: when fluid moves through a magnetic field generated by the meter’s coils, electrodes pick up a voltage proportional to velocity. The physics is unforgiving … Continue reading →

Updated 2026-05-11 by the Sino-Inst engineering team. A shaft torque sensor sits between a motor and the load and reads the twisting force on the rotating shaft. The output is a 4-20 mA, frequency, CAN, … Continue reading →

Updated 2026-05-11 by the Sino-Inst engineering team. A density meter measures the mass per unit volume of a liquid, slurry, or gas, usually in real time and at process pressure. The reading is what you … Continue reading →

Updated 2026-05-11 by the Sino-Inst engineering team. A dew point meter for compressed air reports the pressure dew point (PDP) — the temperature at which water vapour condenses out of the air at line pressure. … Continue reading →

Updated: May 10, 2026 — by Sino-Inst Engineering Team For shaft-mounted sensing on rotating drivetrains — strain gauge, SAW, magnetoelastic, and the maintenance/diagnostic playbook — see our shaft torque sensor guide. A torque transducer turns … Continue reading →

Updated: May 10, 2026 — by Sino-Inst Engineering Team The density of crude oil spans roughly 790 kg/m³ for light condensates to 1,000+ kg/m³ for extra-heavy bitumen, but the oil density you read at the … Continue reading →

Updated: May 10, 2026 — by Sino-Inst Engineering Team A zirconia oxygen sensor reads the O₂ partial pressure in a hot gas stream by exploiting yttria-stabilised zirconia, an oxide ceramic that becomes an O²⁻-ion conductor … Continue reading →

Contents Six technologies for powder level measurement Why powders are harder than liquids Radar for powders: 80 GHz, 26 GHz, and guided wave Vibrating fork and rotary paddle for point level Capacitive, RF-admittance, and ultrasonic … Continue reading →

Contents What is a piezoelectric pressure sensor Working principle: stress to voltage Why static pressure cannot be measured Charge mode vs IEPE/ICP signal conditioning Sensor materials: quartz, PZT, PVDF Operating temperature limits and thermal shock … Continue reading →

Updated 2026-05-09 by the Sino-Inst engineering team. A flow transmitter is the field instrument that turns a flow measurement into a 4-20 mA, HART, Modbus, or pulse signal that a PLC or DCS can read … Continue reading →

Paperless recorders are data loggers that record and trend measurement data over time — replacing strip-chart and circular recorders with a touchscreen, internal flash storage, and Ethernet/Modbus TCP/OPC UA export. Sino-Inst offers a variety of … Continue reading →

Cryogenic pressure transducer for low temperature pressure measurement. -196℃～+125℃, -260℃/-350℃ (special models). Sino-Inst offers a variety of low pressure transducers for industrial pressure measurement. If you have any questions, please contact our sales engineers. Description … Continue reading →

A Type K thermocouple chart converts the millivolt output of a chromel/alumel junction into a temperature reading at 0 °C cold-junction reference. The chart is the IEC 60584-1 reference table — the same numbers used … Continue reading →

Choosing an ultrasonic level sensor for diesel tanks is a tank-geometry problem before it is a sensor-spec problem. The same 4–20 mA transmitter that reads cleanly on a 3 m vertical cylindrical AST can drift, … Continue reading →

Molten salt level measurement is one of the few level applications where the wetted-part metallurgy matters more than the sensor principle. At 565 °C in a concentrated solar power (CSP) cold tank — that is … Continue reading →

A refrigerant flow meter must do something a water flow meter does not: handle a fluid whose density swings from 30 kg/m³ in the suction line to over 1300 kg/m³ in the liquid line of … Continue reading →