Shenzhen Ampron Technology Co., Ltd.

Ampron automotive-grade pressure sensors cover three technology routes: MEMS silicon piezoresistive, ceramic capacitive and glass micro-melt. They measure pressure in engine, transmission, brake, air-conditioning, suspension and fuel-rail systems and output to the ECU for control and warning, and they also serve industrial and medical blood-pressure applications.

Operating temperature -40 to +150 degC; supply 5V +/-0.25VDC; output 0.5-4.5VDC or SENT protocol; ingress protection IP65; ranges cover MEMS 10-400kPa, ceramic oil 0-1000kPaG and glass micro-melt 0-25MPa, all customizable.

• Automotive engine management systems
• Vehicle transmission, brake, suspension and air-conditioning systems
• Gasoline direct injection fuel rail (GDI)
• Industrial and medical pressure measurement

Based on the silicon piezoresistive principle, resistive strips are integrated on a monocrystalline silicon diaphragm to form a Wheatstone bridge for force-to-electrical conversion; also called a diffused-silicon pressure sensor, it offers combined temperature and pressure sensing, high accuracy, good stability and low power consumption.

Operating pressure 10-400kPa (range customizable); accuracy ±1.25%VCC (0-100 degC); total error band ±2%VCC (-40-0 degC) / ±1.75%VCC (100-140 degC); operating temperature -40 to +140 degC; supply 5V±0.25VDC; output 0.5-4.5VDC or SENT; protection IP65; ESD 15KV; electrical interface TYC01-1718645-1.

• Engine intake manifold pressure and temperature
• Canister purge / crankcase ventilation
• Exhaust particulate differential pressure
• Medical blood-pressure monitoring

A fixed ceramic base and a movable ceramic diaphragm are sealed with glass paste to form a variable capacitor; a signal-conditioning chip converts the capacitance change into an electrical signal. The design is highly compatible with the measured media and suits harsh automotive and industrial environments.

Oil pressure 0-1000kPaG (adjustable); accuracy ±1.5%VCC (-20-85 degC) / ±2%VCC (-40-150 degC); burst 30 bar, protection 20 bar; life three million full-scale cycles; operating temperature -40 to +150 degC; supply 5V±0.25VDC; output 0.5-4.5VDC; housing A6061-T6; NPT 1/2 connection.

• Engine oil pressure
• Transmission oil pressure
• Brake and air-conditioning systems
• Car refrigerator / camera cleaning / industrial applications

In glass micro-melt technology, silicon strain gauges (piezoresistors) are bonded onto a stainless-steel (17-4PH) diaphragm by high-temperature sintered glass. The pressure of the medium deforms the diaphragm and changes the strain-gauge resistance, giving good media compatibility at high quality and low cost.

Brake pressure 0-25MPa; withstand pressure 30MPa; burst 40MPa; load impedance 10k to 51k ohm; operating voltage 5V±0.25VDC; operating current max 20mA; output signal SENT/analog; operating temperature -40 to +140 degC.

• Automotive brake ESP systems
• Automotive suspension systems
• Gasoline direct injection fuel rail (GDI)

Force sensors measure the torque of an object and convert it into an electrical signal; they consist of an elastic element and a bridge circuit. Six-axis force sensors simultaneously measure force in three directions (Fx/Fy/Fz) and torque (Mx/My/Mz). Ampron offers both metal-foil strain-gauge and MEMS silicon strain-gauge routes, with stable zero-temperature drift and impact resistance.

Measurement axes: 1 ~ 6 (Fx/Fy/Fz, Mx/My/Mz); Measuring range: 50 N ~ 20 kN; 2 N·m ~ 500 N·m; Accuracy: ≤ 1 % FS; Crosstalk error: ≤ 2 % FS; Overload capacity: 200 % FS; Output signal: RS485 / CAN digital output; Material: Aviation aluminium alloy; Operating temperature: -20 ℃ ~ +80 ℃

• End-effector force control of industrial robot arms
• Robot joint torque
• EMB brake-by-wire force detection

Oxygen sensors use zirconia to conduct oxygen ions at high temperature and thereby measure oxygen concentration; NOx sensors apply the same principle to determine NOx and O2 in exhaust gas. The ceramic element is produced by HTCC technology, co-firing zirconia, platinum electrodes and alumina at high temperature; the TSP layer resists hydrothermal shock and silicon poisoning, while the powder-ring ceramic base provides leakage-tight sealing.

Oxygen sensor resistance (23 degC) 3.2±0.8 ohm; rated voltage 12±1V (PWM); light-off time <12s; accuracy 1.016±0.007 at lambda=1; NOx sensor: NOx 0-2500ppm and O2 0-21%; NOx light-off ≤165s; O2 light-off ≤85s; 12VDC operation compatible with 24VDC.

• Automotive engine air-fuel ratio control
• Motorcycle emissions
• Household ovens / medical oxygen concentration
• Diesel exhaust after-treatment

The ceramic chip uses HTCC technology in which zirconia, platinum electrodes and alumina are co-fired at high temperature, giving good insulation and consistency; a TSP hydrothermal-shock protection layer reduces the risk of cracking caused by condensate and improves resistance to silicon poisoning; powder ring, ceramic and base sealing prevent exhaust leakage from disturbing the signal.

Resistance (23 degC) 3.2±0.8 ohm; rated voltage (PWM) 12±1V; light-off time at 350 degC <12s; measurement accuracy 0.8±0.01 at lambda=0.8, 1.016±0.007 at lambda=1.0 and 1.7±0.05 at lambda=1.7.

• Automotive engines
• Motorcycles
• Household ovens
• Medical oxygen concentration measurement

The ceramic chip uses HTCC technology and a three-chamber structure keeps the signals of each reaction chamber independent; a buffer channel prevents blockage of the gas inlet; a TSP hydrothermal-shock protection layer improves resistance to silicon poisoning, and a powder-ring ceramic base provides leakage-tight sealing.

NOx measuring range 0-2500ppm; O2 measuring range 0-21%; NOx light-off ≤165s; O2 light-off ≤85s; NOx response ≤1300ms; O2 response ≤1000ms; zero-point signal 0-12ppm; maximum zero drift <30ppm; long-term drift <5%/year; operating voltage 12VDC compatible with 24VDC.

• Diesel exhaust after-treatment SCR
• Engine NOx/O2 concentration monitoring

Ampron temperature sensors exploit the property of NTC thermistors whose resistance falls as temperature rises, with high resistance and B-value accuracy and good consistency and packaging adaptable to different environments; PTC thermistors have a positive temperature coefficient and are used for over-current, over-temperature and inrush protection.

NTC resistance and B-value accuracy ±1%; operating temperature -40 to +105/125 degC; temperature probe R25=10k ohm ±1%, B25/50=3950K±1%; PTC is BaTiO3 ferroelectric ceramic with low resistance at room temperature and a sharp rise to high resistance at the Curie point; MZ1 suits 15-1500VAC high-resistance-state operation.

• Home appliances (coffee machines / ovens / refrigerators / air conditioners)
• Automotive and energy-storage systems
• Communication and industrial control
• Over-current and over-temperature protection of lines, motors and equipment

Temperature probes that use high-precision, high-stability NTC thermistors and are packaged according to the operating environment as single-ended glass-sealed, ABS plastic housing with low-temperature resin, or glass-sealed versions; they offer fast response, moisture resistance and easy installation.

Model: NTC R25 = 10 kΩ ±1 %, B25/50 = 3950 K ±1 %; Measuring range: -40 ℃ ~ +105 ℃; Accuracy: ± 1 % (R25); Response time: ≤ 25 s; Isolation voltage: 1250 V AC / 60 s; Insulation resistance: ≥ 100 MΩ @ 500 V DC; Supply voltage: 5 V DC ± 0.1 V; Certification: CQC / UL

• Coffee machines / irons / paper shredders
• Ovens / range hoods
• Refrigerators / energy-storage systems
• Air-conditioner discharge temperature

Negative-temperature-coefficient thermistors made from a single high-purity material with a near-theoretical-density ceramic structure; they are compact, show little variation in resistance and temperature characteristics, respond quickly to temperature changes and enable highly sensitive, high-precision detection.

MF52B resistance 2-200k ohm; B-value and resistance accuracy ±1%; operating temperature -40 to +125 degC; response time ≤12s; dissipation factor ≥2.5mW/degC; the MF58 series is small in size, structurally reliable and highly stable.

• Temperature measurement and compensation
• Home-appliance control
• Automotive electronics
• Communication and industrial control

PTCR positive-temperature-coefficient thermistors based on BaTiO3 ferroelectric ceramic; the material has a very high resistivity at room temperature and, after semiconductive doping, exhibits a strong PTC effect: low resistance at room temperature rising by several orders of magnitude near the Curie point, which enables automatic protection and automatic recovery (self-resetting fuse).

Model: MZ1 resin-coated leaded; Rated voltage: 15 V ~ 1500 V AC; Trip current: 0.1 A ~ 2.0 A; Operating temperature: Curie point 60 ℃ ~ 120 ℃; Response time: ≤ 5 s; Service life: ≥ 1000 cycles; Certification: TUV / CQC / UL

• Switching power supplies / transformers / adapters / chargers
• Micro-motor protection
• Home-appliance control boards (air conditioners / microwave ovens)
• Over-current and overload protection of instruments

Gas sensors use the thermal-conductivity principle: the change in thermal conductivity of a gas mixture gives its concentration, with excellent long-term stability and tolerance of harsh environments; flow sensors use the thermal principle and detect the temperature-gradient change caused by mass flow to measure gas mass flow, with a good signal-to-noise ratio and repeatability.

A2L refrigerant detector range 1-100%LFL, accuracy ±5%LFL, RS485 Modbus, 3.3-5.5VDC, -40 to 85 degC, IP54; medical flow 15-100SLM, accuracy ±4%Reading, I2C/analog output, typical response 5ms; hydrogen sensors are based on the thermal-conductivity principle.

• A2L refrigerant leakage in air conditioning / heat pumps / refrigeration
• Hydrogen concentration detection
• Ventilator and anesthesia machine flow
• Clean dry gas mass flow

Gas-concentration sensors based on the thermal-conductivity principle: the concentration of the target gas is derived from the change in thermal conductivity of the gas mixture, offering superior long-term stability and resistance to harsh environments compared with other principles.

A2L refrigerant detector, target gases R454B/R32, range 1-100%LFL, accuracy ±5%LFL, warm-up 5s, response <10s, alarm point 10%LFL (configurable), lifetime >15 years, RS485 Modbus, 3.3-5.5VDC, -40 to 85 degC, IP54, to UL 60335-2-40 Annex LL; hydrogen sensors measure the hydrogen concentration in air based on the thermal-conductivity principle.

• Refrigerant leakage safety in air conditioners / heat pumps
• Hydrogen detection
• Protection of refrigeration systems

Based on the thermal flowmeter principle, a pair of thermocouples detects the temperature-gradient change caused by mass flow in order to measure gas mass flow, with an excellent signal-to-noise ratio and repeatable results.

Measuring range: 15 / 20 / 50 / 100 SLM; Accuracy: ± 1 % FS (0 ~ 25 % FS); Repeatability: 0.5 % FS; Response time: ≤ 5 ms; Supply voltage: 5 V DC; Output signal: Analogue 1 ~ 5 V / I2C; Operating temperature: -25 ℃ ~ +65 ℃; Protection rating: Parylene coating

• Ventilators / anesthesia machines / CPAP / nebulizers
• Tidal volume monitoring and ventilation control
• Clean dry gas mass-flow measurement