Series A3000 Photohelic® Pressure Switch/Gage

3-in-1 Indicating Gage, Lo-limit and Hi-limit Control

The Series A3000 Photohelic® Switch/Gages function as versatile, highly repeatable pressure switches combined with a precise pressure gage employing the time-proven Magnehelic® gage design. The Photohelic® switch/gage measures and controls positive, negative or differential pressures of air and compatible gases. Standard models are rated to 25 psig (1.7 bar) with options to 35 (2.4) or 80 (5.5 bar) psig. Two phototransistor actuated, DPDT relays are included for low/high limit control. Easy to adjust set point indicators are controlled by knobs located on the gage face. Individual set point deadband is one pointer width - less than 1% of full scale. Set points can be interlocked to provide variable deadband - ideal for control of fans, dampers, etc. Gage reading is continuous and unaffected by switch operation, even during loss of electrical power. Choose from full scale pressure ranges from a low 0-.25 in (0-6 mm) w.c. up to 30 psi (21 bar).

Product Applications

Air Conditioning Systems

Clean Rooms

Fume Exhaust Systems

Specifications

GAGE SPECIFICATIONS

Service:Air and non-combustible, compatible gases.

Wetted Materials:Consult Factory.

Accuracy:±2% of FS at 70°F (21.1°C).±3% on -0 and ±4% on -00 models.

Pressure Limits:-20" Hg. to 25 psig (-0.677 to 1.72 bar). MP option; 35 psig (2.41 bar), HP option; 80 psig (5.52 bar).

Temperature Limits:20 to 120°F.(-6.67 to 48.9°C). -20 to 120°F (-28 to 48.9°C) with low temperature option.

Process Connections:1/8" female NPT.

Size:4"(101.6 mm) dial face, 5" (127 mm) O.D. x 8-1/4" (209.55 mm).

Weight:4lb (1.81 kg).

Series A3000 Photohelic® Pressure Switch/Gage

3-in-1 Indicating Gage, Lo-limit and Hi-limit Control

The Series A3000 Photohelic® Switch/Gages function as versatile, highly repeatable pressure switches combined with a precise pressure gage employing the time-proven Magnehelic® gage design. The Photohelic® switch/gage measures and controls positive, negative or differential pressures of air and compatible gases. Standard models are rated to 25 psig (1.7 bar) with options to 35 (2.4) or 80 (5.5 bar) psig. Two phototransistor actuated, DPDT relays are included for low/high limit control. Easy to adjust set point indicators are controlled by knobs located on the gage face. Individual set point deadband is one pointer width - less than 1% of full scale. Set points can be interlocked to provide variable deadband - ideal for control of fans, dampers, etc. Gage reading is continuous and unaffected by switch operation, even during loss of electrical power. Choose from full scale pressure ranges from a low 0-.25 in (0-6 mm) w.c. up to 30 psi (21 bar).

Product Applications

Air Conditioning Systems

Clean Rooms

Fume Exhaust Systems

Specifications

GAGE SPECIFICATIONS

Service:Air and non-combustible, compatible gases.

Wetted Materials:Consult Factory.

Accuracy:±2% of FS at 70°F (21.1°C).±3% on -0 and ±4% on -00 models.

Pressure Limits:-20" Hg. to 25 psig (-0.677 to 1.72 bar). MP option; 35 psig (2.41 bar), HP option; 80 psig (5.52 bar).

Temperature Limits:20 to 120°F.(-6.67 to 48.9°C). -20 to 120°F (-28 to 48.9°C) with low temperature option.

Process Connections:1/8" female NPT.

Size:4"(101.6 mm) dial face, 5" (127 mm) O.D. x 8-1/4" (209.55 mm).

Weight:4lb (1.81 kg).