The Miljoco-Weiss PB300804-1-25 is a Miljoco PB3008 dual indicating pressure/temperature gauge (tridicator) reading 0-60 psi / 0-400 kPa and 50 to 320°F / 10 to 160°C on one 3″ dial, with a 1/4″ NPT back connection.
Tridicators combine the value of an individual pressure gauge and thermometer in one instrument, with a Bourdon tube assembly to indicate pressure and a bimetal coil assembly to indicate temperature in Fahrenheit and Celsius.
The manufacturer describes them as the ideal choice for boilers and other hot water applications where space limitations and installation costs are a consideration.
Specifications on this page are taken from the Miljoco PB3008 / PB3008L datasheet. Verified 2026-09-11.
Markets
The manufacturer lists this series for the following applications.
- Boilers
- Hot water applications
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
Pressure and temperature in one dial
Bourdon tube pressure indication and bimetal coil temperature indication in one instrument.
Dual unit scales
Pressure in psi and kPa (0-60 psi / 0-400 kPa); temperature in °F and °C (50 to 320°F / 10 to 160°C).
Color coded dial
Aluminum dial, white finish, with red temperature and blue pressure markings.
Brass stem
Brass stem, 0.320″ diameter.
Glass lens, drawn steel case
Drawn steel case and crimped ring, black finished, with a glass lens.
Technical Specifications
| Model | PB300804-1-25 |
| Type | Dual indicating pressure/temperature gauge (tridicator) |
| Ordering Code | Model PB3008, range code 04, stem/connection code 1-25 |
| Pressure Range | 0-60 psi / 0-400 kPa |
| Temperature Range | 50 to 320°F / 10 to 160°C |
| Pressure Scale Fig. / Div. | psi 10 / 2; kPa 100 / 20 |
| Temperature Scale Fig. / Div. | °F 40 / 5; °C 20 / 2 |
| Dial Size | 3″ |
| Case | Drawn steel, black finished |
| Ring | Crimped drawn steel, black finished |
| Lens | Glass |
| Dial | Aluminum, white finished with red temperature and blue pressure markings |
| Pointers | Aluminum, black, non-adjustable |
| Movement | Brass |
| Bourdon Tube | Phosphor bronze |
| Outlet | Back |
| Connection | 1/4″ NPT |
| Stem | Brass, 0.320″ diameter |
| Dimensions (in.) | U 1.32, S 1.00 |
| Accuracy | Pressure scale ±3-2-3%; temperature scale ±one scale division |
| Ambient Temperature | -40 to 250°F (-40 to 120°C) |
Service note. Not suitable for steam service.
Source Notes
Source note: Dial size source. The PB3008 datasheet text does not print the dial size. The 3″ dial size is taken from the Miljoco Specialty Gauges product page listing for Model PB3008.
Documentation
Related Products
Frequently Asked Questions
What does the PB300804-1-25 read?
Pressure 0-60 psi / 0-400 kPa and temperature 50 to 320°F / 10 to 160°C on the same dial.
Can it be used on steam?
No. The datasheet warns that the PB3008 and PB3008L are not suitable for steam service.
Where is the connection?
Back outlet, 1/4″ NPT, per stem/connection code 1-25.
How accurate is it?
Pressure scale ±3-2-3%; temperature scale ±one scale division.
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-Temperature Gauge
- Series:
- PB3008
- Dial Size:
- 3 in
- Pressure Range:
- 0-60 psi
- Temperature Range:
- 50/320°F
- Connection Size:
- 1/4 in
- Connection Location:
- Back
- Case Material:
- Steel
- Stem Material:
- Brass
