Showing 1–16 of 25 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
-
- 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
-
- Integrated type: ranges 0–3 up to 0–100 m; split type: 0–3 up to 0–70 m
- Accuracy 0.25%; blind zone from 0.15 m
- Output 4–20 mA and RS-485; relay control (2-channel integrated / 4-channel split)
- Supply 24 VDC or 220 VAC; IP68 protection
- Explosion-proof split version Exd(ia) II BT4; acid/alkali-proof version with PTFE-faced sensor
- 12864 dot-matrix display (integrated type)
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.
