Showing 1–16 of 26 results
-
- Ranges from 0–1 kPa up to 0–100 MPa; gauge, absolute and vacuum (negative) pressure
- Accuracy classes ±0.1%FS, ±0.25%FS, ±0.5%FS
- 2-wire 4–20 mA; RS485, 4–20 mA + HART, 0–5 VDC, 0–10 VDC selectable
- 200% of span overload; vibration resistance 20 g, 20–5000 Hz; shock 100 g, 11 ms
- High-temperature variant to -40–200 °C; flush-diaphragm flange and sanitary clamp versions
- Intrinsically safe and flameproof options; LCD or LED display optional
-
- 80 GHz high-frequency FMCW radar with WKD18 sensor
- Maximum measuring distance up to 70 m
- Narrow beam and small antenna for easy installation
- Unaffected by steam, dust, foam, temperature and pressure variation
- Threaded base or flange sealing mount
- Suited to low-dielectric media and solids/powder silos
-
- For micro pressure and negative pressure of non-corrosive gases
- Ranges 0-6KPa, 0-10KPa, 0-16KPa, 0-25KPa, 0-40KPa, 0-60KPa, 0-100KPa
- Dial sizes 3″ (60 mm), 4″ (100 mm), 5″ (150 mm)
- Stainless steel version for corrosion-demanding processes
- Threads 1/4″, 3/8″ BSP, BSPT, NPT, M14x1.5, M20x1.5
- Accuracy class 2.5
-
- Measuring range -0.1~60MPa; accuracy ≤±0.25%FS
- Long-term stability <0.2%/year; supply 12-32VDC; IP65
- Outputs 4-20mA (2-wire), 0-5V / 1-5V / 0-10V
- Working temperature -30~80℃; medium temperature -40℃~120℃
- Six sensor variants: ceramic, diffused-silicon, digital display (131S), high-temperature (131G), sanitary (131MC), flush-diaphragm (131PM)
- Threads M20x1.5, M12x1.5, M14x1.5, G1/4, G1/2, 1/2NPT, 1/4NPT
-
- Diaphragm seal isolates the sensor from corrosive, viscous or crystallizing media
- Two process interfaces: flange-mounted or threaded diaphragm seal
- Based on our explosion-proof transmitter family: -0.1~60MPa, ≤±0.25%FS
- Output 4~20mADC; supply 12-32VDC; IP65
- Long-term stability <0.2%/year
-
- Intrinsically safe design for hazardous areas
- Measuring range -0.1~60MPa; accuracy ≤±0.25%FS (0.5 and 0.25 accuracy-class variants)
- Output 4~20mADC; supply 12-32VDC
- Industrial explosion-proof housing with digital pressure display
- Long-term stability <0.2%/year; IP65; working temperature -30~70℃
-
- Measuring ranges 0.1–60 MPa (steps 0.1, 0.16, 0.25, 0.4, 0.6, 1, 1.6, 2.5, 4, 6, 10, 16, 25, 40, 60)
- Dial sizes 2″ (50 mm) to 7″ (250 mm)
- Radial or axial (back) connection
- Copper-alloy wetted parts
- Threads from 1/8″ to M10x1, M14x1.5, M20x1.5
- Accuracy class 1.6%–2.5%
-
- Thermocouple types S, K and E; special and armored (mineral-insulated) constructions
- Type S long-term service up to 1300 °C
- Type K long-term 700–1200 °C by wire diameter; type E 350–750 °C
- Wire diameters 0.3–3.2 mm per max-temperature table
- Sheath materials GH3030, GH3030+310S, 1Cr18Ni9Ti, 304, 316
- Armored sheath GH3030 long-term 1100 °C; 1Cr18Ni9Ti/304/316 long-term 800 °C
-
- 4–20 mA output, DC24V supply
- Temperature accuracy ±0.5 °C
- Response time ≤10 s
- Ambient -20–80 °C, ≤95% RH
- Thread or flange mounting
-
- Reference accuracy up to ±0.05%; spans from 0.1 kPa up to 40 MPa
- 2-wire 4–20 mA output; HART, RS485, 0–5 V and 0–10 V selectable
- IP66 / IP67 protection; Ex ia IIC T6 Gb intrinsically safe or Ex d IIC T6 Gb flameproof options
- MEMS monocrystalline silicon sensor with dual-diaphragm overload protection
- 8 variants: gauge, absolute, differential, flange, capillary remote-seal and level types
- Capillary remote-seal versions handle media up to 420 °C
-
Overview The Oval Gear Flowmeter is a type of positive displacement flow meter, known for its high accuracy and reliability. It works by using mechanical measuring elements (oval gears) to continuously divide the fluid into known volumetric segments. By counting the number of times these chambers are filled and emptied, it accurately measures the total…
-
- Built-in slide-wire resistance transmitter for remote secondary instruments
- Accuracy class 1.6
- Transmitter full-scale resistance 340~400Ω
- Applied voltage ≤6V (10V can be customized)
- Ambient temperature -40~60℃, relative humidity ≤85%
-
- Glycerin-filled case damps vibration and pulsation
- Stainless steel case
- Dial sizes 1″ (40 mm) to 7″ (250 mm)
- Threads 1/8″ in G, PT, NPT plus M10x1, M14x1.5, M20x1.5
- Accuracy class 1.6%–2.5%
- For winches, air compressors, hydraulic machinery and engines
-
- Reference accuracy 0.075% (±0.075% and ±0.2% options); stability ±0.01%/year
- 100:1 turndown; output 4-20mA DC with HART
- Differential (DP), gauge (GP) and absolute (AP) pressure inputs
- Supply 11.9~45VDC; HART load 250~1500Ω; start-up time 5s
- Isolating diaphragms: 316LSS, Hastelloy C-276, tantalum, Monel
- Approvals listed: CSA, FM, ATEX, GOST; single and double remote-seal variants
-
- Measuring range 0–200 mH₂O
- Accuracy 0.25% and 0.5%; display accuracy ±0.1% FS
- Long-term stability <0.2%/year
- 316L stainless steel isolated-diaphragm sensing structure
- Supply 12–32 VDC; IP65; working temp -30–70 °C
- Variants: armored rod/cable, submersible cable, anti-corrosion, measurement & control set
-
- PT100 platinum RTD sensing element, measuring range -200–1300 °C
- Output 4–20 mA, 0–5 VDC or 0–10 VDC; RS485 / RS232 / HART optional
- Accuracy 0.2% / 0.5%; long-term stability better than 0.2%/year
- Explosion-proof rating Ex d II CT6 (as printed), IP65 protection
- 24 VDC supply, power consumption ≤1 W, load resistance ≤500 Ω
- Threads M20×1.5, M27×2, G1/2, G1/4; probe stem 8 / 10 / 12 mm, fully customizable
Product Categories
- Pressure Transmitters — Gauge, absolute and differential pressure, monocrystalline silicon sensors up to ±0.05%, 4-20 mA/HART.
- Pressure Gauges — General purpose, stainless steel, diaphragm-seal, electric contact and digital gauges.
- Temperature Instruments — Thermocouples, RTDs, bimetal thermometers and integrated temperature transmitters.
- Level Instruments — 80 GHz radar, ultrasonic, submersible hydrostatic and magnetic level instruments.
- Flow Meters — Electromagnetic, vortex, turbine and ultrasonic flow meters, DN10 to DN3000.
- IoT & Wireless Telemetry — NB-IoT pressure and level transmitters and wireless data loggers for remote sites.
Why Buy Factory-Direct from WELK Meters
- One factory, full scope — pressure, temperature, level, flow and telemetry from a single supplier with matching documentation.
- Small MOQ welcome — sample orders and pilot quantities accepted; T/T and L/C terms negotiable.
- OEM/ODM supported — private label, custom ranges and special process connections from small volumes.
- Engineer-direct support — send your specification or an OEM part number and get a recommendation within 24 hours.
- Calibrated before shipment — every instrument ships with a factory calibration record and English documentation.
Can't find the model you need? Send us your specification — we engineer instruments to customer requirements when standard models do not fit.
