APSL801 High-Pressure Gas Fully Automatic Piston Pressure Gauge
Overview
Product Overview
The APSL801 High-Pressure Gas Fully Automatic Piston Pressure Gauge comprises an air compressor, the APSL811 intelligent high-pressure gas source, a dedicated pressure controller (test bench) and a fully automatic gas piston pressure gauge. The gauge sends a pressure setpoint by verification point, holding the source near that value while the controller applies fine positive/negative adjustment (±10%) to float the piston; source outlet pressure is slowly brought back by controlling the controller's intake and exhaust valves.
The APSL811 source (compressor drive gas PL 0.3–0.8 MPa, 1–1.5 m³/min; nitrogen inlet PA 0.1–0.8 MPa, never above 1 MPa; two-stage high-pressure pump outlet Po 1–100 MPa, stable Po=120×PL+10×PA) uses a Japanese auto-regulator (set 0.05–0.85 MPa, max 3 m³/min, max supply 1.25 MPa, 1/2" NPT, control accuracy ±0.01 MPa ≈ ±1.2 MPa outlet). The pump controller measures PL, PA and Po, allows local/serial/WiFi setpoints, auto-adjusts PL by formula, and provides full alarms (PL out of range or 0.05 MPa off the required value, PA out of range, Po 2 MPa over setpoint) with pressurization stopped on any alarm.
Safety features
No manual valves so operators never touch the high-pressure source
8 mm stainless hard-seal tubing leak-tight even at 300 MPa
Very low inlet pressure removes hazards and extends nitrogen efficiency
Precise outlet/drive control prevents runaway
Steel enclosure contains any leak
The dedicated controller (0.5 MPa control gas) raises/lowers pressure via pneumatic needle valves, vents through an expansion-deceleration device, can depressurize the source, controls piston position within ±1 mm, and mounts 2–4 devices under test (M20×1.5).
Gauge accuracy
Pressure: Class 0.005/0.01/0.02
Current: (0–22) mA, Class 0.02
Voltage: (0–5.5) V, Class 0.02
Working medium: compressed nitrogen with a gas-liquid separation system so the test gas is oil-free and maintenance-free.
Pressure ranges
(1–100) MPa / (1–70) MPa / (1–60) MPa / (1–40) MPa / (1–25) MPa
Effective piston area: 0.2 cm² for (1–25) MPa and 0.1 cm² for the higher ranges, all conforming to JJG59-2022.
Piston specifications
Travel / resolution: ±5 mm / 0.1 mm
Speed: 30 rpm
Temperature: 15–25 °C at 0.1 °C
Electrical specifications
24 V output
Current/voltage channels: 2–4
Materials and construction
304 stainless weights (8000±50 kg/m³)
Tungsten-carbide rod and cylinder (Ø22 mm, fit length 30/40 mm)
Weight: 100 kg (excluding weights)
Enclosure: 526×459×215 mm
Operating conditions
Temperature: (20±1) °C
Humidity: ≤80% RH
Power supply: 220 V/50 Hz
Software and compliance
Compatible with TMMS-2000 software for automatic report printing
Operating modes: controller stepping by preset step
Transmitter (5 points), digital gauge (10 points) and precision gauge (auto points by range) fully automatic verification
Complies with JJG59-2022 and JJG99-2006
