Temperature Switches, Watertight and Explosion-Proof Enclosure
P-Series
This top-of-the-line Ashcroft® process switch series includes many state-of-the-art features for safety and reliability in virtually all process applications.
• Choice of watertight NEMA 4X or explosion-proof NEMA 7/9, IP55 enclosures (NEMA 4 meets Class I, Div. 2, Groups A, B, C, & D with hermetically sealed switch
• Single or dual independently adjustable setpoints meet all setpoint requirements
• UL listings standard
• CSA listings available
• Dual-chamber design for improved safety. Choice of switch elements for all applications, including hermetically sealed
• Fixed or fully adjustable deadband
• Setpoints adjustable from 15-100% of range
Select a link under the "item" tab below to order.
| Table 1 | Table 2 | Table 3 | Table 4 | Table 5 | Table 6 | Table 7 | Table 8 | Table 9 |
| XXX | X | XXX | XX | X | XXXXXXXXXX | XX | XX | XXX |
| Table 1 | Function |
| PTD | Temperature control, two independently adjustable setpoints, fixed deadband |
| PTA | Temperature control, single setpoint, adjustable deadband |
| PTS | Temperature control, single setpoint, fixed deadband |
| Table 2 | Temperature Range |
| Nominal Range |
| 500 to 750⁽⁵⁾ | 200 to 400 |
| Nominal Range |
| 350 to 525⁽⁸⁾ | 175 to 275 |
| Nominal Range |
| 235 to 375 | 110 to 190 |
| Nominal Range |
| 150 to 260 | 65 to125 |
| Nominal Range |
| 75 to 205 | 20 to 95 |
| Nominal Range |
| 0 to 100 | –20 to 40 |
| Nominal Range |
| –40 to 60 | –40 to16 |
| Nominal Range |
| °F | °C |
| Table 2 | Options |
| XNH | Stainless steel tagging |
| Table 3 | Enclosure |
| N4 | NEMA 4/4X, IP65 (watertight and corrosion resistant) |
| N7 | NEMA 7/9, IP65 (explosion proof Div. 1 & 2) |
| Table 4 | Switch Element |
| H | General purpose |
| J | Hermetically sealed switch, general purpose |
| Table 5 | Line length |
| Direct Mount |
| Line Length ft |
| Direct Mount |
| Not Applicable |
| Table 2 | Line Length |
| Remote Mount |
| 10 | 10 |
| Remote Mount |
| Line Length ft |
| Remote Mount |
| 25 | 25 |
| Remote Mount |
| 20 | 20 |
| Remote Mount |
| 15 | 15 |
| Remote Mount |
| 05 | 5 |
| Table 2 | Thermal System |
| DIRECT MOUNT |
| No entry required for Direct Mount |
| REMOTE MOUNT |
| A7 | Stainless Steel Armor (Std.) |
| REMOTE MOUNT |
| Description |
| Table 2 | Bulb Length |
| DIRECT MOUNT |
| 040 | 4˝ |
| DIRECT MOUNT |
| 060 | 6˝ |
| DIRECT MOUNT |
| 090 | 9˝ |
| DIRECT MOUNT |
| 120 | 12˝ |
| DIRECT MOUNT |
| 027 | 2¾˝ |
| DIRECT MOUNT |
| “S” Dimension |
| REMOTE MOUNT |
| “S” Dimension |
| REMOTE MOUNT |
| 030 | 3˝ |
