The Miljoco-Weiss NF4UGY1-400-2L is a Weiss process pressure gauge with a 4-1/2″ dial, a 0-400 psi pressure range and a 1/2″ NPT lower connection.
The Weiss NF4UGY1 is a 4-1/2″ process pressure gauge with a black fiberglass reinforced PBT case of solid front construction and a blow out back safety design.
It uses a brass socket with a phosphor bronze C tube and silver brazed joints.
Specifications on this page are taken from the Weiss Series NF4UGY1 / NF4UGY2 submittal. Verified 2026-09-11.
Warranty
Miljoco-Weiss warrants its products to be free from material defects in material and workmanship for 12 months from the date of shipment, or such other period as provided in the product documentation, per the published Miljoco-Weiss terms and conditions of sale (Section 15, Limited Warranty).
Key Features
Solid front, blow out back
Fiberglass reinforced PBT case with solid front construction and blow out back safety design.
0.5% accuracy, Grade 2A
ASME B40.1 Grade 2A.
Dual scale psi/kPa dial
4-1/2″ dual scale dial.
Brass and bronze wetted parts
Brass socket, phosphor bronze C tube, silver brazed.
Micrometer adjustable pointer
Black aluminum pointer, micrometer adjustable.
Technical Specifications
| Model | NF4UGY1-400-2L |
| Type | Process pressure gauge, dry construction |
| Ordering Code | Series NF4UGY1, range 0-400 psi, connection 1/2 in NPT lower |
| Range | 0-400 psi |
| Dial | 4-1/2″ dual scale psi/kPa |
| Case | Black fiberglass reinforced polybutylene terephthalate (PBT), solid front construction, blow out back safety design |
| Ring | Reinforced polypropylene |
| Window | Tempered glass (shatter proof glass or acrylic available) |
| Gaskets | Buna N |
| Socket | Brass |
| Bourdon Tube | Phosphor bronze C tube to 600 psi (this range: Phosphor bronze C tube) |
| Connecting Joints | Silver brazed |
| Movement | Bushed stainless steel rotary |
| Pointer | Black aluminum, micrometer adjustable |
| Accuracy | 0.5% ASME B40.1 Grade 2A |
| Connection | 1/2″ NPT lower |
Source Notes
Source note: Part number decode. The range and connection segments of this part number are decoded with the Weiss code convention published in the Weiss Stainless Steel Case Gauges catalog To Specify table (numeric code = 0 to that psi, VAC = 0-30 inHg vacuum, V code = 30 inHg vacuum to that psi, 4L = 1/4 in lower, 4B = 1/4 in back); this family's own documents do not print a code table.
Documentation
Related Products
Frequently Asked Questions
What range does the NF4UGY1-400-2L read?
0-400 psi.
What is the process connection?
1/2″ NPT lower.
How accurate is it?
The published accuracy for this series is 0.5% ASME B40.1 Grade 2A.
What are the wetted materials?
Socket: Brass; Bourdon Tube: Phosphor bronze C tube to 600 psi (this range: Phosphor bronze C tube).
Manufacturer Warranty
Miljoco-Weiss warrants this product to be free from material defects in material and workmanship for 12 months from date of shipment, per the published Miljoco-Weiss terms and conditions of sale.
Warranty service requires written notice of the defect within seven days of discovery. Remedy is repair, replacement or credit at the manufacturer's discretion. Normal wear, corrosion, misuse and unauthorized modification are excluded.
- Type:
- Pressure Gauge
- Series:
- NF4UGY1
- Dial Size:
- 4-1/2 in
- Pressure Range:
- 0-400 psi
- Range Type:
- Pressure
- Connection Size:
- 1/2 in
- Connection Location:
- Lower
- Case Material:
- Reinforced PBT
- Wetted Material:
- Phosphor Bronze
- Fill:
- Dry
- Accuracy:
- Plus or Minus 0.5 Percent
