The Miljoco-Weiss 4UGN-1-100-4L is a Weiss industrial pressure gauge with a 4-1/2″ dial, a 0-100 psi pressure range and a 1/4″ NPT lower connection.
The Weiss UG-1 is a 4-1/2″ industrial pressure gauge with a phosphor bronze C tube, silver brazed joints and a bushed brass rotary movement.
Case style N is the flangeless aluminum case, equipped with a safety blow out disc.
Specifications on this page are taken from the Weiss Series UG-1 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
0.5% accuracy, Grade 2A
ASME B40.1 Grade 2A.
Micrometer adjustable pointer
Black aluminum pointer, micrometer adjustable.
Safety blow out disc
Flangeless aluminum case equipped with a safety blow out disc.
Silver brazed phosphor bronze tube
Phosphor bronze C tube to 1000 psi with silver brazed connecting joints.
Technical Specifications
| Model | 4UGN-1-100-4L |
| Type | Industrial pressure gauge |
| Ordering Code | 4UG-1 with case style N (flangeless aluminum), range code 100, connection code 4L |
| Range | 0-100 psi |
| Graduations | Figure interval 10 psi, minor graduation 1 psi |
| Dial Size | 4-1/2″ |
| Case | Flangeless aluminum, equipped with safety blow out disc |
| Window | Glass |
| Dial | White aluminum, black markings |
| Pointer | Black aluminum, micrometer adjustable |
| Socket | Brass |
| Bourdon Tube | Phosphor bronze C tube to 1000 psi |
| Connecting Joints | Silver brazed |
| Movement | Bushed brass rotary |
| Accuracy | 0.5% ASME B40.1 Grade 2A |
| Connection | 1/4″ NPT lower |
| Options | Acrylic window, red set hand |
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 4UGN-1-100-4L read?
0-100 psi. Figure interval 10 psi, minor graduation 1 psi.
What is the process connection?
1/4″ 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 1000 psi.
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:
- 4UGN
- Dial Size:
- 4-1/2 in
- Pressure Range:
- 0-100 psi
- Range Type:
- Pressure
- Connection Size:
- 1/4 in
- Connection Location:
- Lower
- Case Material:
- Aluminum
- Wetted Material:
- Phosphor Bronze
- Fill:
- Dry
- Accuracy:
- Plus or Minus 0.5 Percent
