Dwyer 热式流量开关 TDFS2系列

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产品特色

• Better reliability and life expectancy than mechanical flow switches with no paddles or vanes to wear or break, no jams in the paddle movement, and no seals on movement assembly to wear or leak

• Not affected by empty pipe as it avoids overheating by actively heating above the process temperature and then cooling down to process temperature

• Low pressure drop; only needs to be inserted 10% into the flow (e.g. 1/8" for 3/4" schedule 40 pipe)

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技术指标

Service    Compatible water-based fluids

Wetted Materials    316SS

Pipe Range    1/2 to 1-1/2" (15 to 40 mm) or 2 to 10" (50 to 250 mm) (model selectable)

Set Point Range    0.5 to 10 ft/s (0.15 to 3.0 m/s)

Repeatability    0.07 ft/s (0.02 m/s) +3% of setpoint

Typical Deadband    0.1 ft/s (0.03 m/s) +15% of setpoint

Temperature Limits    Ambient: 5 to 140°F (-15 to 60°C); Process: 5 to 140°F (-15 to 60°C), Storage: -40 to 185°F (-40 to 85°C)

Pressure Limits    300 psig (20.67 bar)

Response Time    Approx. 8 s

Power Requirement    9 to 24 VDC

Switching Current    400 mA, de-rate 5 mA/°C above 23°C

Current Consumption    Average: 93 mA; Peak: 300 mA

Electrical Connection    1/2' NPT female or cable glａnd with 4 conductor 22 AWG 6' (1.83 m) long (model selectable)

Process Connection    1/2" NPT or BSPT male (model selectable)

Enclosure Rating    NEMA 4X (IP65)

Housing Materials    316 SS, 416 SS, polycarbonate, neoprene, and acrylated urethane

Switch Type    1 NO NPN, 1 NC NPN

Input Power and Protection    0.5A fuse (resettable) reverse polarity protected

Switched Output Protection    0.5A fuse (resettable) reverse polarity protected

Agency Approvals    CE

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选项配件

Image	Model   Number	Description
	100571-00	Replacement set point magnet
	A-TEE-SS-1	1" NPT SS Tee
	A-TEE-SS-1-BSPT	1" BSPT SS Tee
	A-TEE-SS-1-1/2	1-1/2" NPT SS Tee
	A-TEE-SS-1-1/4	1-1/4" NPT SS Tee
	A-TEE-SS-1-1/4-BSPT	1-1/4" BSPT SS Tee
	A-TEE-SS-1/2	1/2" NPT SS Tee
	A-TEE-SS-1/2-BSPT	1/2" BSPT SS Tee
	A-TEE-SS-3/4	3/4" NPT SS Tee
	A-TEE-SS-3/4-BSPT	3/4" BSPT SS Tee
	A-WLDT-CS	1/2" NPT CS Weldolet for 2-10"   pipe sizes
	A-WLDT-CS-BSPT	1/2" BSPT CS Weldolet for 2-10"   pipe sizes
	A-WLDT-SS	1/2" NPT SS Weldolet for 2-10"   pipe sizes
	A-WLDT-SS-BSPT	1/2" NPT SS Weldolet for 2-10"   pipe sizes

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