AC Ammeters
, Iron Vane Movement
• Glass window for optimum viewing
• Rugged black plastic case
• Black spade-type pointer for easy distant 
reading
Accuracy: 
Frequency models:
Wattmeters: 
Movement:
Tracking: 
Shielding: 
Response Time: 
Overload (1 sec.): 
Overload 
(Continuous): 
Repeatability: 
Dial:
Case: 
Resistance: 
Operating Temp: 
Pointer:
Scale Length:
Net Weight:
±2% F.S. (Iron-Vane), ±3% F.S. (Rectifier) 
45-55Hz ±0.3Hz (120V-240V) 
55-65Hz ±0.3Hz (120V-240V) 
380-420Hz ±1.2Hz (120V-240V)
+
2% F.S.; Compensated Meters: +3% F.S.
Models 55, 155: Iron-vane, magnetically damped 
Models 45, 145: Annular, rectifier type 
Models 85 & 185: small core magnet, self-shielding 
Models 25, 27, 29, 125: Annular, self-shielding
±3% 
Calibration is unaffected by magnetic panel mounting.
1.5 seconds maximum 
10 times F. S.
1.5 times F. S. 
2%
Sharp clear scale. Each dial arc is calibrated to track 
the specific type of movement used.
High density black plastic 
±15%
-4°F to +149°F (-20°C to +65°C) 
Models 85 & 185: knife edge, black finish
All others: spade pointer with black matte finish 
Model 155 & 185: 1.6” (40.6mm) 
Models 125 & 145: 1.8” (45.7mm) 
Model 55: 2.3” (58.4mm) 
Models 25, 27, 45 & 85: 2.5” (63.5m) 
Model 29: 3.80” (96.5mm)
Models 55, 155 & 185: 5oz (0.14kg) 
Models 85, 125, 145 & 45: 7oz (0.20kg) 
Models 25 & 27: 8oz (.23kg) 
Model 29: 11oz. (.31kg)
Specifications
Ordering Information
AC Microammeters Rectifier Type, 
Self Shielding Movement
Range
Approx.
Impedance
(ohms) 
3-1/2”Model 45
Model/Size and Catalog Number
0-100
3400
04080
AC Milliammeters,
Iron Vane & Rectified Movement
* Rectified Models
<> Available on special order. 
* These meters require use of an external current transformer from page C4-C6
4-220mA  Process  Meters,  
Dial indicates 0-100 Percent
more >>
Approx. 
Impedance
(ohms) @ 60 Hz
600 
200
887.0
80.0
717.2
8.76
3.1 
.9
2-1/2"
Model 155
<> 
<> 
<> 
<> 
<> 
<>
06080
<>
3-1/2"
Model 55
<>
<> 
05380 
05400 
05410 
35069 
05420 
05430
4-1/2”
Model 45
06820* 
06840*
<> 
<> 
<> 
<> 
<> 
<>
Model/Size and Catalog Number
Range 
0-1 
0-5 
0-10 
0-15 
0-100 
0-150 
0-250 
0-500
Range
0-1 
0-1.5 
0-2 
0-3 
0-5 
0-10 
0-15 
0-25 
0-30 
0-50 
0-75 
0-75 
0-100 
0-150 
0-200 
0-250 
0-300 
0-500
Approx.
Impedance
(ohms) @ 60 Hz
.213 
.105 
.065 
.028 
.008 
.004
.0025
.002
.0015
.001
.0002
.008 
.008 
.008 
.008 
.008 
.008 
.008
2-1/2"
Model 155
02100
<> 
02120 
02130 
02140 
02150 
02160 
02170 
02180 
02190
<>
02200* 
02210* 
02220*
<>
02240*
<>
02260*
3-1/2"
Model 55
00950 
00960 
00970 
00980 
00990 
01001 
01010 
01020       
01030 
01040 
03432
<> 
01060* 
01070* 
01080* 
01090* 
01100* 
01110*
Model/Size and Catalog Number
Range
Approx. Impedance
(Ohms)
Model/Size and Catalog number
3-1/2” Model 25
4-20 5.0 35022