Miniature Liquid Level Sensors

Transcription

1 C US File No (L ) Applications Typical applications include automatic vending machines, photocopiers, small collection tanks, miniature pumping stations, pilot plants and similar small system applications. Controlling delivery of plating liquid liquid level sensing Nickel plating liquid is used for surface treatment of electronic parts. The liquid is automatically fed into a plating bath with the P-V-2PG detecting the upper and lower levels. Miniature Liquid Level Sensors Compact size Low cost eliability/long switch life Can be used in a wide range of liquids Utility design for shock resistive construction in the float These miniature liquid level switches have been designed for reliable operation in small tanks and containers. Their rugged design and careful engineering make them the perfect solution for OEM and large volume applications. Operational Description The stem of these miniature liquid level switches contains a hermetically sealed reed switch. The float contains a permanent magnet. As the float rises or falls with the level of the liquid, the reed switch is activated by the magnet. On most models, the operation of the switch, normally open (NO) or normally closed (NC), is easily changed by removing a retaining clip and inverting the float. Commercial Coffee Maker The S-V-UN is mounted in the water tank to detect the lower limit of the hot water. The S-V-UN is suitable for food and pharmaceutical applications because the float joints are plasma welded and the surface is buffed smooth. C26 Tel. 1/43/73-7 1//2-7 Tel (0) Tel Tel

2 liquid level sensing (49) Protection from Electrical Surges Overvoltage eed switches are not designed for the direct starting of inductive loads such as motors, contactors, solenoid valves, etc. They are susceptible to damage from overvoltages. Do not exceed the specified switch ratings listed in the specifications charts. Contactors should be wired to miniature relays, suppressors or similar devices. STI recommends the use of the relay unit, Model CU (Complete CU-7000 specifications are located on the following STI website: /6204) Overcurrent Momentary surge currents produced by switching lamps or stray capacity from long cable lengths can weld the reed switches. Contactors should be wired to our Model CU-7000 relay unit, coils in series, or suppressors. (Complete CU-7000 specifications are located on the following STI website: /6204) Intrinsic Safety Any of the STI float switch level controls may be used with STI Intrinsic Safety Barriers (IS) to meet hazardous location requirements for level control device. For more information see /710. For hazardous location requirements see the website at /02. Submersibility These miniature liquid level switches are not designed to operate when fully submersed. The S-VE-S1 and S-VE-S2 series float switches can be submersed for short periods up to 76 hours under 00 mm depth of water at 20 C temperature. Water will penetrate the float for elevated temperatures and/or greater depths. Wiring White (yellow) Switch Black (yellow) Technical Notes The sealing compound over the lead wire egress prevents moisture penetration, but is insufficient to prevent water penetration. Please install in an appropriate location or apply a suitable sealant. If there is surface wave motion, use a time delay relay to dampen the switch action. The switch should be located away from strong magnetic fields such as those produced by motors or solenoid valves. Maximum allowable impact is 10 g. Shocks greater than this can damage the switch. Maximum tensile force on the lead wire is 4.4 lb. (19.6 N) Exceeding this during installation may damage the switch. Ordering Information Please order by part number, as shown on the specification charts on the following pages. Switch ating See specification charts on the following pages. For the Latest Information Try Our Fax Back System at 1/916/ On the Internet: sales@stiapg.com Tel. 1/43/73-7 1//2-7 Tel (0) Tel Tel C27

3 (49) Plastic Specifications liquid level sensing Series E (3) Model E11P-0 E11P-1 E11-0 E11-1 E12P-0 E12P-1 E12-0 E12-1 Part Number Switch Type A Switch Type B Material Polypropylene Polypropylene Polypropylene Polypropylene Polypropylene (1) Buna (1) Polypropylene (1) Buna (1) etainer 316L SS 316L SS 316L SS 316L SS Operating Temperature ange 14 to 194 F 14 to 194 F 14 to 194 F 14 to 194 F ( 10 to 90 C) ( 10 to 90 C) ( 10 to 90 C) ( 10 to 90 C) Pressure ating 7 psi 14 psi 7 psi 14 psi (0. bar) (10 bar) (0. bar) (10 bar) Mounting Vertical Vertical Vertical Vertical Switch ating (by model code) 0A/0B 1A/1B 0A/0B 1A/1B 0A/0B 1A/1B 0A/0B 1A/1B Maximum Capacity 10 VA 0 VA 10 VA 0 VA 10 VA 0 VA 10 VA 0 VA Nominal Current 0.1 A 0. A 0.1 A 0. A 0.1 A 0. A 0.1 A 0. A Maximum Voltage 100 VAC VAC 100 VAC VAC 100 VAC VAC 100 VAC VAC Life Expectancy (# of actuations) s #22 AWG #22 AWG #22 AWG #22 AWG 11. or 39.4 in. 11. or 39.4 in. 11. or 39.4 in. 11. or 39.4 in. ( or 1000 mm) ( or 1000 mm) ( or 1000 mm) ( or 1000 mm) Minimum SG Dimensions in./mm G 1/ * G 1/ * Ø0.9 2 Switch A: 0.9 in. (1 mm) Switch A: 0.71 in. (1 mm) Switch A: 0.9 in. (2 mm) Switch A: 1.10 in. (2 mm) Switch B: 0. in. (14 mm) Switch B: 0.67 in. ( mm) Switch B: 0.91 in.. (23 mm) Switch B: 1.02 in. (26 mm) (1) The float magnet is exposed on these models and is in direct contact with liquids. (2) Alternative cables in PVC are available in lengths up to 7.7 in. (2000 mm). VCTF Ø, (.2, 0.3 mm 2 ) (3) Switch action of the E is nonreversible. Select Code A (NC) or Code B (NO). Specifications are subject to change without notice. Ø Ø0.9 2 Ø C2 Tel. 1/43/73-7 1//2-7 Tel (0) Tel Tel

4 liquid level sensing (49) P P-V-2A P-V-2F P-V-2PG P-VE-B Polyacetal PVDF Polypropylene Polypropylene Buna PVDF Polypropylene BUNA 316L SS PVDF Polypropylene Polypropylene 14 to 194 F 14 to 212 F 14 to 194 F F ( 10 to 90 C) ( 10 to 100 C) ( 10 to 90 C) (0 C) 14 psi 14 psi 7 psi 14 psi (10 bar) (10 bar) (0. bar) (10 bar) Vertical Vertical Vertical Vertical 0 VA 0 VA 0 VA 0V A 0. A 0. A 0. A 0. A VAC VAC VAC VAC/DC #22 AWG #22 AWG #22 AWG #22 AWG 11. or 39.4 in. (2) 11. or 39.4 in. (2) 11. or 39.4 in. (2) ( mm) ( or 1000 mm) (2) ( or 1000 mm) (2) ( or 1000 mm) (2) G 1/ Ø0.9 2 OFF G 1/ Ø0.9 2 OFF G 1/ Ø0.9 2 OFF PF 1/ Ø Ø For the Latest Information Try Our Fax Back System at 1/916/ On the Internet: sales@stiapg.com Tel. 1/43/73-7 1//2-7 Tel (0) Tel Tel C29

5 (49) Plastic Specifications (continued) liquid level sensing Series Model P-VE-P1 P-VE-P2 P-H-3 (4) P-H-10 Part Number Material Polypropylene Polypropylene Polypropylene Polypropylene Polypropylene Polypropylene Polypropylene (1) Polypropylene etainer Polypropylene Polypropylene Polypropylene Polypropylene Operating Temperature 194 F 194 F 14 to 194 F 14 to 194 F (90 C) (90 C) ( 10 to 90 C) ( 10 to 90 C) Pressure ating 7 psi 7 psi 7 psi 7 psi (0. bar) (0. bar) (0. bar) (0. bar) Mounting Vertical Vertical Horizontal Horizontal Switch ating (by model code) Maximum Capacity 0 VA 0 VA 0 VA 0 VA Nominal Current 0. A 0. A 0. A 0. A Maximum Voltage VAC/DC VAC/DC VAC VAC Life Expectancy (# of actuations) s #22 AWG #22 AWG #22 AWG #22 AWG ( mm) ( mm) 11. or 39.4 in. (2) 11. or 39.4 in. (2) P ( or 1000 mm) (2) ( or 1000 mm) (2) Minimum SG Dimensions in./mm PH M x 1. Ø Ø PF 1/ Ø Ø Ø G 1/ Ø1.1 2 PH OFF End View G 1/4 (2) Alternative cables in PVC are available in lengths up to 7.7 in. (2000 mm). VCTF Ø, (.2, 0.3 mm 2 ) (4) The PH-3 is nonreversible. Use NO (Up ) only. Specifications are subject to change without notice. C30 Tel. 1/43/73-7 1//2-7 Tel (0) Tel Tel

6 liquid level sensing (49) P P-HE-P1 P-HE-N1 P-HE-P2 P-HE-N Polypropylene 6-nylon Polypropylene 6-nylon Polypropylene 6-nylon Polypropylene 6-nylon n/a n/a n/a F 230 F F 230 F (0 C) (110 C) (0 C) (110 C) 7 psi 7 psi 7 psi 7 psi (0. bar) (0. bar) (0. bar) (0. bar) Horizontal Horizontal Horizontal Horizontal 0 VA 0 VA 0 VA 0 VA 0. A 0. A 0. A 0. A VAC/DC VAC/DC VAC/DC VAC/DC 10 7 #22 AWG #22 AWG #22 AWG #22 AWG ( mm) ( mm) ( mm) ( mm) Ø Ø Grommet PF 1/4 NPT 1/2 For the Latest Information Try Our Fax Back System at 1/916/ On the Internet: sales@stiapg.com Tel. 1/43/73-7 1//2-7 Tel (0) Tel Tel C31

7 (49) Metal Specifications liquid level sensing Series S Model S-V-G S-V-UN S-V-30 S-V-0 Part Number Material 316L SS 316L SS 304 SS 304 SS 316L SS 316L SS 316L SS 316L SS etainer 316L SS 316L SS 304 SS 304 SS Operating Temperature 14 to 212 F () 14 to 212 F 14 to 24 F 14 to 392 F (-10 to 100 C) () (-10 to 100 C) ( 10 to 120 C) (200 C) Pressure ating 290 psi 290 psi 290 psi 290 psi (20 bar) (20 bar) (20 bar) (20 bar) Mounting Vertical Vertical Vertical Vertical Switch ating (by model code) Maximum Capacity 0 VA 0 VA 1 VA 110 VA Nominal Current 0. A 0. A 0.06 A 0. A Maximum Voltage VAC VAC 264 VAC 220 VAC Life Expectancy (# of actuations) s #22 AWG #22 AWG Silicon Silicon cable ( or 1000 mm) ( mm) (0.3 mm 2 ) (400 mm) (0. mm 2 ) (400 mm) Minimum SG Dimensions in./mm G 1/ OFF / NPT 1/4 Hex /2 Hex Ø Ø1.1 2 Ø Ø Ø Ø () Optional 24 F (120 C) available Specifications are subject to change without notice. C32 Tel. 1/43/73-7 1//2-7 Tel (0) Tel Tel

8 liquid level sensing (49) S S-VE-S1 S-VE-S2 S-VE-S3 S-VE-S SS 316L SS 304 SS 316L SS 304 SS 316L SS 304 SS 316L SS 304 SS 316L SS 304 SS 316L SS 390 F 390 F 390 F 390 F (200 C) (200 C) (200 C) (200 C) 290 psi 290 psi 290 psi 290 psi (20 bar) (20 bar) (20 bar) (20 bar) Vertical Vertical Vertical Vertical 0 VA 0V A 0 VA 0 VA 0. A 0. A 0. A 0. A VAC/DC VAC/DC VAC/DC VAC/DC #22 AWG #22 AWG #22 AWG #22 AWG (30 mm) (30 mm) (30 mm) (30 mm) PF 1/ PF 1/ PF 3/ PF 3/ Ø1.1 2 Ø Ø1.1 2 Ø Ø Ø Ø Ø For the Latest Information Try Our Fax Back System at 1/916/ On the Internet: sales@stiapg.com Tel. 1/43/73-7 1//2-7 Tel (0) Tel Tel C33

9 (49) Metal Specifications (continued) liquid level sensing Series S Model S-H-10 S-H-2S/90 Part Number Material 316L SS 304 SS 316L SS 316L SS etainer 316L SS 304 SS Operating Temperature 14 to 24 F 14 to 212 F (-10 to 120 C) (-10 to 100 C) Pressure ating 14 psi 290 psi (10 bar) (20 bar) Mounting Horizontal Horizontal Switch ating (by model code) Maximum Capacity 0 VA 0 VA Nominal Current 0. A 0. A Maximum Voltage VAC VAC Life Expectancy (# of actuations) s #22 AWG #22 AWG ( mm) ( mm) Minimum SG Dimensions in./mm G 1/ Ø0.67 1/ Ø Ø Specifications are subject to change without notice. C34 Tel. 1/43/73-7 1//2-7 Tel (0) Tel Tel

10 liquid level sensing (49) S S-HE-S1 S-HE-S SS 304 SS 304 SS 304 SS n/a n/a 20 F 20 F (120 C) (120 C) 14 psi 14 psi (10 bar) (10 bar) Horizontal Horizontal 0 VA 0 VA 0. A 0. A VAC/DC VAC/DC #22 AWG #22 AWG (00 mm) (00 mm) Ø Ø PF 1/ NPT 1/2 For the Latest Information Try Our Fax Back System at 1/916/ On the Internet: sales@stiapg.com Tel. 1/43/73-7 1//2-7 Tel (0) Tel Tel C3