GESTRA于1902年创立。GESTRA的目标是优化工厂的蒸汽和能源使用，从而提高运营可靠性和流程效率。
GESTRA变送器LRGT系列技术参数
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Model and mechanical connection
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Thread G1 A, EN ISO 228-1
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Nominal pressure rating, admissible service pressure and temperature
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PN 40, 32 bar (g) at 238 °C
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Materials
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Terminal box: 3.2581 G AlSi12, powder-coated
Sheath: 1.4301 X5 CrNi 18-10
Measuring electrodes: 1.4571 X6CrNiMoTi17-12-2
Electrode insulation: PTFE
Measuring tube/screw: 1.4571, X6CrNiMoTi17-12-2
Spacer disc: PEEK.
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Available electrode lengths (do not shorten)
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200, 300, 400, 500, 600, 800,1000 (mm)
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Temperature sensor
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Resistance thermometer: Pt 1000
Measuring range for fluid temperature: 0 to 280 °C
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Conductivity range at 25 °C
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0.5 μS/cm to 6000 μS/cm, 0.25 - 3000 ppm
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Measuring cycle
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1 second
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Temperature compensation
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The temperature compensation process is linear and set via parameter tC.
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Supply voltage
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24 V DC +/-20 %
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Power consumption
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Max. 7 VA
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Max. 7 VA
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Max. 0.35 A
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Internal fuse
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T2A
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Safety cutout at excessive ambient temperature
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The cutout takes place at an excessive ambient temperature of Tamb. = 75 °C
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Electrode voltage
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< 500 mV (RMS) at no load
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Analogue output
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1 x actual value output 4 - 20 mA
Maximum output load 500 Ω
M12 connector, 5-pole, A-coded
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Indicators and controls
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1 x 4-digit green 7-segment display for indicating actual values and status information
1 x red LED for indicating an error state
3 x green LED for indicating the unit μS/cm / ppm and OK status
1 x rotary knob IP65 with button for menu navigation and test function
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Protection class
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III Safety Extra Low Voltage (SELV)
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IP rating to EN 60529
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IP 65
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Admissible ambient conditions
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Service temperature: 0 °C - 70 °C
Storage temperature: - 40 °C - 80 °C
Transport temperature: - 40 °C - 80 °C
Air humidity: 10 % - 95 % (non-condensing)
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Weight
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Approx. 2.1 kg
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GESTRA变送器LRGT系列介绍
LRGT 16-3、LRGT 16-4 和 LRGT 17-3 电导率变送器可用作电导率限制器和排污控制器，以连续测量加压蒸汽和热水设备中的电导率。它们通过 4 - 20 mA 电流输出在参数化测量范围内呈现线性电导率曲线。
结合安全电子控制单元，LRGT 16-3、LRGT 16-4 和 LRGT 17-3 电导率变送器适用于高达 SIL 2 的安全功能。
LRGT 16-3, LRGT 16-4 and LRGT 17-3 conductivity trans - mitters can be used as conductivity limiters and blowdown controllers to continually measure conductivity in pressurised steam and hot-water plants. They present a linear profile of conductivity in the parameterised measuring range via a 4 - 20 mA current output.
In combination with secure electronic control units, LRGT 16-3, LRGT 16-4 and LRGT 17-3 conductivity transmit - ters are suitable for safety functions up to SIL 2.
GESTRA变送器LRGT系列其他常用型号：
GESTRA LRGT 16-3
GESTRA LRGT 16-4
GESTRA LRGT 17-3