Pressure ranges

300 Series (all)

Vacuum and compound ranges through 0 psi to 15,000 psi

Accuracy

25-300, 25-310
40-300, 40-310

±1.6% full scale
± 1% full scale

Temperature ranges*

300 Series (all)

Media -4 °F to 140 °F (-20 °C to 60 °C) Ambient 0 °F to 160 °F (-18 °C to 71 °C) Optional temperature ratings available from -40 °F to 212 °F (-40 °C to 100 °C)

Measuring element

25-300, 25-310(≤ 600 psi)
25-300, 25-310(800 psi to 6,000 psi)
25-300, 25-310(7,500 psi to 15,000 psi)
40-300, 40-310(≤ 1,000 psi)
40-300, 40-310(15,000 psi)

Copper alloy “C” tube
Copper alloy coiled safety tube
316 Stainless Steel coiled safety tube
Copper alloy “C” tube
316 Stainless Steel coiled safety tube

Connection

25-300, 25-310
40-300, 40-310

1/4″ NPT die-cast Brass with the case. 7/16″ – 20 SAE adjustable type straight thread with FKM O-ring is also available as a stock option on many ranges (-4 SAE)
1/4″ NPT die-cast Brass with the case. 1/2″ NPT is available on certain 40-300 ranges as a stock option, and on all other 40-300 and 40-310’s as a non-stock option.

Case

300 Series (all)

Die cast Brass (natural Brass fi nish) with safety relief plug

Cover ring

300 Series (all)

Polished Brass

Lens

300 Series (all)

Acrylic with o-ring seal

Pointer

300 Series (all)

Balanced Aluminum, black fi nish

Dial

300 Series (all)

Aluminum, white background with black scale. UV resistant.

Movement

300 Series (all)

Brass and Nickel-silver with highly polished bearing surfaces

Fill liquid**

300 Series (all)

Glycerin